Everyone learns something in life, and with more knowledge, you can read these articles through. Only through these articles can we understand some differences between natural barium sulfate and precipitated barium sulfate. Natural barium sulfate grows in objects and does not require better purification. If it is precipitated barium sulfate, then it is through some technological precipitation and some scientific additions, which can make more of these barium sulfates. some developments. Because natural barium sulfate is grown in nature, we don't need more decomposition, and we don't need to do more research on it, it's barium sulfate itself. However, precipitated barium sulfate is better synthesized through some chemical components in real life. Through some substances of calcium and magnesium, these precipitated barium sulfate can be developed more and more barium sulfate can be produced. . Because some natural barium sulfate can better extract some of its quality, through these extracted things, more barium sulfate can be precipitated in Qincheng, and it can also make the difference between them more obvious. We all know that natural is born in nature, and synthetic precipitation, then it is better decomposed through industry and science and technology the day after tomorrow. We are mainly engaged in the research and development, production and management of high purity and reagent chemicals. The main products of our company are: Nitrate, chromate, Acetate, Oxalate, Bromide, P-Nitrobenzoic acid,please contact us.

Manganese chloride tetrahydrate is used as a catalyst for organic chlorination, a drier for paint and a raw material for gasoline anti-vibration agents. It is used in the manufacture of feed auxiliaries, analytical reagents, dyes and pigments, aluminum alloy smelting, brown-black brick and tile production, and pharmaceutical and dry battery manufacturing. It is also used as a trace element fertilizer in agriculture, and can be used as acid soil base fertilizer, top dressing or top dressing outside the root. Mainly used as catalyst for organic chlorination, raw material of gasoline anti-vibration agent and paint drier, also used in fertilizer, aluminum alloy smelting, pharmaceutical and dry battery, etc. Nature Pale pink monoclinic translucent crystal. There is deliquescence. Its crystals have two forms, a and p. The a-type is a monoclinic columnar crystal, which is relatively stable; the p-type is a monoclinic plate-shaped crystal, which is unstable. Melting point 58°C; d 2.01. Soluble in 0.7 part of water, soluble in ethanol, insoluble in ether. It is absorbent and easy to deliquescence. At 106 °C, one molecule of crystal water is lost, and at 200 °C, all crystal water is lost to form anhydrous. When the anhydrous is heated in the air, it is decomposed by water and releases HCI to generate Mn 04. Manufacturing Method The crushed magnesite is reacted with excess hydrochloric acid in the reactor, and after the reaction is completed, the excess remaining hydrochloric acid is neutralized with lime, and the pH value is controlled to be about 4, and then hydrogen peroxide is added to remove iron. Then, m

Strontium fluoride is a white powder, slightly soluble in water, soluble in hydrochloric acid, insoluble in hydrofluoric acid, ethanol and acetone. It belongs to cubic crystal system, which is stable in air and can be decomposed by strong acid. Density 4.24, melting point 1473 ℃, boiling point 2489 ℃. In air > 1000 ℃ into strontium oxide. Manufacturing Method Make strontium carbonate and water into a slurry, gradually add 40% hydrofluoric acid to react, control the mid-point pH value, and keep it unchanged. The product is filtered, dried and pulverized to obtain the finished product of strontium fluoride. Use It can be used to manufacture optical glass and single crystal for laser. It can also be used in the pharmaceutical industry and daily chemical industry, such as toothpaste anti-caries additives, fluxes, etc. Safety Plastic woven bags are lined with plastic bags, each bag has a net weight of 25kg, or each container bag has a net weight of 1000kg. It should be stored in a ventilated and dry warehouse, and should not be stored and transported together with acids. When loading and unloading, it should be handled with care to prevent the package from being damaged. It is an inorganic toxic substance, and the hazard code is GB 6.1 class 61513. Wash off with water in case of contact with skin. Rinse with lukewarm water if it gets into eyes. Accidental ingestion poisoning with 2% calcium chloride gastric lavage, intravenous injection of calcium gluconate. Work clothes, protective masks and latex gloves should be worn during operation to prevent inhalation of aluminum fluoride dust. The produ

Ammonium oxalate crystal violet staining solution is a component of Gram staining. In Gram-positive bacteria staining, cells are stained with ammonium oxalate crystal violet and then treated with Gram iodine solution to form an insoluble complex, which cannot pass through the cell wall and is not easily decolorized, so it remains purple. After staining, the bacteria are in sharp contrast with the environment, and the morphology, arrangement and certain structural characteristics of the bacteria can be clearly observed, which can be used for classification and identification. Operation steps (for reference only): 1. Operate according to the specific requirements of the experiment 2. Smear: Take the bacteria to be tested, apply a thin layer on the center of the glass slide or drop a little sterile water on the glass slide, mix the bacteria and water evenly, and apply a thin layer. 3. Drying: After smearing, let it dry naturally at room temperature, or warm it slightly on an alcohol lamp to make it dry quickly. 4. Fixation: Hold one end of the glass slide with the specimen facing up, and move it back and forth quickly 3 to 5 times on the outside of the flame of the alcohol lamp, each time for 1 s. It can also be fixed with methanol or ethanol. 5. Initial dyeing: add crystal violet staining solution dropwise to dye for 1-2 minutes, rinse with water to remove the dyeing solution. 6. Mordant: Add Gram iodine solution dropwise, and cover the slides for 1-2 minutes at room temperature, then wash with water. 7. Decolorization: dropwise a

Calcium fluoride, the main component of fluorite minerals, is also the main source of fluorine, which can be used to prepare important chemical reagents such as hydrogen fluoride, fluorine gas, and fluoride. Calcium fluoride has a very wide range of applications, mainly used in three major industries such as metallurgy, chemical industry and building materials; in addition, it is also inseparable in national defense, sculpture, optics, light industry, etc. With the country's proposal of "carbon peaking" and "carbon neutrality", more and more photovoltaic companies and photovoltaic products have sprung up one after another. Therefore, the demand for calcium fluoride is also increasing rapidly; correspondingly, the waste calcium fluoride is also increasing rapidly. Discarded calcium fluoride belongs to the solid waste category and is insoluble in water. Although it is not a hazardous waste product, the recycling rate is low, so it is basically difficult to see the phenomenon that calcium fluoride solid waste is recycled again. Discarded calcium fluoride is light and insoluble in water. Once dried, it is easy to raise dust, which will cause great dust pollution to the environment. In addition, after encountering water, it will flow away with the water flow, and it will also be harmful to rivers and lakes. produce environmental pollution. The dried calcium fluoride waste is very similar in appearance to gypsum, but is handled very differently. Calcium fluoride is not viscous even in a very wet state and is very loose; it is therefore difficult to aggregate them together, let alone directly use them for brick processing, even sintering. The requirements for the production and treatment of solid waste non-burning bricks are that the materials t

Barium carbonate, chemical formula BaCO3, molecular weight 197.336. White powder. Insoluble in water, density 4.43g/cm3, melting point 881℃. 1450 ℃ decomposition, release carbon dioxide. Slightly soluble in water containing carbon dioxide, also soluble in ammonium chloride or ammonium nitrate solution to form a complex, soluble in hydrochloric acid and nitric acid to release carbon dioxide. poisonous. Used in electronics, instrumentation and metallurgical industries. Preparation of fireworks, signal flares, ceramic coatings, accessories for optical glass. Also used as rodenticide, water clarifier and filler. Emergency treatment: Isolate the leaked contaminated area and restrict access. It is recommended that emergency personnel wear dust masks (full face masks) and protective clothing. Do not come into direct contact with spillage. Small spills: Avoid raising dust and collect with a clean shovel in a dry, clean, covered container. Large spills: Cover with plastic sheeting, canvas. Then collect for recycling or transport to waste disposal sites for disposal. Closed operation, local exhaust. Operators must undergo special training and strictly abide by operating procedures. It is recommended that operators wear self-priming filter dust masks, chemical safety goggles, anti-virus clothing and rubber gloves. Avoid generating dust. Avoid contact with acids. When handling, it should be lightly loaded and unloaded to prevent damage to packaging and containers. Equipped with leakage emergency treatment equipment. Empty containers may be harmful residues. Storage Precautions: Store in a cool, ventilated warehouse. Keep away from fire and heat sources. Package is sealed. It should be stored separately from acids and edible chemicals, and should not be stored together. Storage areas should b

Calcium acetate is the acetate salt of calcium with the chemical formula C4H6CaO4. The common name for calcium acetate is calcium acetate. Anhydrous calcium acetate is very hygroscopic, so common calcium acetate exists in the form of monohydrate (Ca(CH3COO)2.H2O, CAS [5743-26-0]). 1. After being neutralized by pyrolignoic acid (wood acetic acid) and calcium hydroxide, the filtrate is evaporated to dryness and recrystallized to obtain; 2. Reaction of acetic acid with calcium hydroxide or calcium carbonate, filtered, concentrated and cooled to obtain dihydrate salt (colorless crystal), heated to 84°C to obtain monohydrate salt (colorless crystal), heated to 100°C to obtain anhydrous salt Salt; 3. Take shells as raw materials, wash, pulverize and dry for 1 hour, roast at 900~1000℃ for 2 hours, and then add water to make 1.3~1.5mol/L lime milk. Then neutralize with acetic acid to clarify, filter, concentrate the filtrate, and finally dry at 120-140°C to obtain the finished product with a yield of 91.28%. Add calcium carbonate powder to 20% acetic acid solution until CO2 gas no longer escapes, then add a small amount of calcium carbonate, heat to 80°C for 2~3h reaction, and the filtrate is heated and concentrated in a water bath, and a small amount of 80% acetic acid is added at the same time. That is, calcium acetate monohydrate is precipitated (the one precipitated after the solution is cooled is dihydrate), and finally the finished product is obtained by drying at 60-70°C. The chemical equation is as follows: 2CH3COOH+CaCO3→(CH3COO)2Ca+H2O+CO2↑ 4. Method for anhydrous calcium acetate: add the refined powdered calcium carbonate to

Silver nitrate is an inorganic compound with the chemical formula AgNO3. It is a white crystalline powder, easily soluble in water, ammonia, glycerol, and slightly soluble in ethanol. Pure silver nitrate is stable to light, but its aqueous solution and solid are often stored in brown reagent bottles due to insufficient purity of the general product. It is used in photographic emulsions, silver plating, mirror making, printing, medicine, hair dyeing, testing chloride ions, bromide ions and iodine ions, etc. It is also used in the electronics industry. Chemical properties Silver nitrate turns gray-black when encountering organic matter, and decomposes into silver. Pure silver nitrate is stable to light, but its aqueous solution and solid are often stored in brown reagent bottles due to insufficient purity of the general product. Silver nitrate decomposes into silver, nitrogen, oxygen and nitrogen dioxide when heated to 444°C. Aqueous and ethanolic solutions are neutral to litmus, with a pH of about 6. The boiling point of 444 ° C (decomposition). Oxidative. In the presence of organic matter, it turns gray or gray-black when exposed to light. Silver nitrate can undergo precipitation or coordination reactions with a series of reagents. For example, react with hydrogen sulfide to form black silver sulfide Ag2S precipitate; react with potassium chromate to form reddish-brown silver chromate Ag2CrO4 precipitate; react with disodium hydrogen phosphate to form yellow silver phosphate Ag3PO4 precipitate; react with halide ions, A silver halide AgX precipitate is formed. It can also interact with alkali to form brown-black silver oxide Ag2O precipitation; interact with oxalate ion to form white silver oxalate Ag2C2O4 precipitation, etc. Silver nitrate can react with NH3, CN-, SCN-, etc. to form various coordination molecules.

Pale pink monoclinic translucent crystal. There is deliquescence. Its crystals have two forms, a and p. The a-type is a monoclinic columnar crystal, which is relatively stable; the p-type is a monoclinic plate-shaped crystal, which is unstable. Melting point 58°C; d 2.01. Soluble in 0.7 part of water, soluble in ethanol, insoluble in ether. It is absorbent and easy to deliquescence. At 106 °C, one molecule of crystal water is lost, and at 200 °C, all crystal water is lost to form anhydrous. When the anhydrous is heated in the air, it is decomposed by water and releases HCI to generate Mn 04. Manufacturing Method The crushed magnesite is reacted with excess hydrochloric acid in the reactor, after the reaction is completed, the excess remaining hydrochloric acid is neutralized with lime, and the pH value is controlled to be about 4, and then hydrogen peroxide is added to remove iron. Then, manganese sulfate is added to the solution to remove calcium, and the purified solution is evaporated, filtered, evaporated and concentrated, cooled for crystallization, and centrifuged. Use Analytical reagents for microanalysis of gallium and periodate. It can also be used as a catalyst for organic chlorination, a raw material for gasoline anti-vibration agents and a drier for paints. It is also used in the manufacture of chemical fertilizers, feed additives, dyes and pigments, aluminum alloy smelting, brown-black brick and tile production, and pharmaceutical and battery industries. We are mainly engaged in the research and development, production and management of high purity and reagent chemicals. The main products of our company are: Nitrate, chromate, Acetate, Oxalate, Bromide, P-Ni

How much is "precipitated barium sulfate sand"? What is the main material for making barium sulfate board? , drying, crushing and sieving to become the product. Precipitated barium sulfate has fine texture, high whiteness, and high acid, alkali, light, heat and chemical properties. The density of precipitated barium sulfate is 10, and the oil absorption is 10-15%. The refractive index is . The powder coating film has high gloss and good leveling, and is currently the most used type of powder coating. The principle is that in an acidic solution, barium chromate and sulfate form barium sulfate precipitation and release chromate ions. After the solution is neutralized, the excess barium chromate and the generated barium sulfate are still in the precipitation state, and the precipitation is removed by filtration. Under alkaline conditions, the chromate ion is yellow, and the content of sulfate can be known by measuring its absorbance. I think everyone in the industry is very familiar with it. We remove barium sulfate precipitation when we don`t need it, but how can we remove it effectively? Of course, it would be a pity if the removed barium sulfate is disposed of as waste. Today I would like to tell you about the subsequent recycling of barium sulfate. How can barium continue to create new value. As a simple example, barium chloride is often added in our process of refining brine. Raw materials or fillers for batteries, as fillers and reinforcements in rubber products, as fillers and weighting agents in polyvinyl chloride resins, and as surface coating agents for printing paper and coated paper. Barium sulfate is an unregulated chemical, and it is not dangerous, but according to the chemical properties of natural barium sulfate, it is known to be corrosive to a certain extent. On the sk

Lithium nitrate is an inorganic compound with the chemical formula LiNO3. It is a white crystalline powder, soluble in water and ethanol. It is mainly used in the manufacture of ceramics and fireworks. It can also be used as a heat exchange medium and an analytical reagent. Skin Contact: Remove contaminated clothing and rinse skin thoroughly with soap and water. Eye Contact: Lift the eyelids and flush with running water or normal saline. seek medical attention. Inhalation: Quickly leave the scene to fresh air. Keep the airway open. If breathing is difficult, give oxygen. If breathing stops, give artificial respiration immediately. seek medical attention. Ingestion: Drink enough warm water to induce vomiting. seek medical attention. Operation precautions: closed operation, local exhaust. Operators must undergo special training and strictly abide by operating procedures. It is recommended that operators wear self-priming filter dust masks, chemical safety goggles, polyethylene protective clothing, and neoprene gloves. Keep away from fire and heat sources, and smoking is strictly prohibited in the workplace. Keep away from flammable and combustible materials. Avoid generating dust. Avoid contact with reducing agents. When handling, it should be lightly loaded and unloaded to prevent damage to packaging and containers. Equipped with the corresponding variety and quantity of fire fighting equipment and leakage emergency treatment equipment. Empty containers may be harmful residues. Storage Precautions: Store in a cool, ventilated warehouse. Keep away from fire and heat sources. Packaging must be completely sealed to prevent moist

Manganese carbonate, or manganese carbonate, is an inorganic compound, carbonate of divalent manganese, with the chemical formula MnCO3. Soluble in dilute acid, insoluble in water and ethanol. Manganese carbonate is the raw material for the manufacture of soft ferrite for telecommunication equipment, the synthesis of manganese dioxide and the manufacture of other manganese salts. Used as a catalyst for desulfurization, as a pigment for enamels, coatings and varnishes. Also used as fertilizer and feed additive. It is used in medicine, welding rod accessories, etc., as raw material for the production of electrolytic manganese metal. Manganese hydroxide, manganese oxyhydroxide, and manganese carbonate are all precipitates. Manganese hydroxide, white precipitate, solid at room temperature. Trivalent Mn ions are generated in acidic solutions. Manganese oxyhydroxide, black solid, insoluble in water, soluble in acid solution, insoluble in alkaline solution. Manganese carbonate is a pink to almost white powder that fades to light brown in air. Thermal decomposition. Soluble in dilute acid, insoluble in water and ethanol. Relative density 3.1. 1. Manganese hydroxide It is unstable in alkaline solution, and disproportionation reaction occurs immediately; in acidic solution, trivalent Mn ions are generated, which immediately disproportionate into divalent Mn ions and manganese dioxide; thermal decomposition. 2. Manganese carbonate Manganese dioxide has strong oxidizing property in acidic medium. It works with dilute

Clouds are formed by the liquefaction of water vapor. The artificial rainfall of anti-aircraft artillery is to shoot cannonballs containing silver iodide into the middle and low altitudes of 4000 to 5000 meters where the thickness of the cloud is relatively thick. Condensed rapidly, and after reaching a certain volume, rainfall occurred. Many countries in the world generally use silver iodide as a catalyst for artificial rainfall. China adopts the method of interspersed use of dry ice and silver iodide. Dry ice is sprinkled into the clouds from the bilge "funnel" of artificial rainfall aircraft. When silver iodide is used as a catalyst, a rocket can be used to launch silver iodide flares. Application principle of common catalysts for artificial rainfall AgI and dry ice are used for artificial rainfall, and the mechanism of action is different. Dry ice can reduce the temperature of clouds and promote the condensation of water vapor; AgI can act as a condensation nucleus for water vapor. 1. The application principle of dry ice Dry ice is solid carbon dioxide. Usually carbon dioxide gas will become a colorless liquid under the conditions of pressurization and cooling, and then reduce the temperature, it will become a snow-like solid, and after compression, it will become dry ice. In terms of appearance, dry ice is indeed very similar to ordinary ice, and its appearance is the same as ice. Under a standard atmospheric pressure, it will not melt immediately after being heated, but will directly become a gas at -78.5 ° C and disappear, unlike ice that will leave water marks after melting, hence the name "dry ice".

Nickel formate's alias is nickel formate salt; nickel formate (II) salt, EINECS is 222-101-0, molecular formula is C2H2NiO4, molecular weight is 148.72, when carefully heated to 130 ~ 140 ℃, it loses crystal water and becomes anhydrous . It decomposes into nickel, carbon monoxide, carbon dioxide, hydrogen, water and methane at 180-200 °C. Soluble in water, insoluble in concentrated formic acid. It is obtained by the action of nickel sulfate solution and sodium formate or nickel hydroxide dissolved in formic acid for crystallization. For nickel plating, manufacture of nickel powder and nickel catalyst, etc. Our products with exclusive competitive edge are: explosive and detonation devices, High purity nitrate series, high purity strontium barium salt series, phosphorus chemical products series, electronic and fluorescent water application products series, chemical reagents and p-nitrobenzoic acid and etc., customized products and special products can be produced according to customer needs and requirements. Vietnam Fine Chemical Link-win Factory is located in Tỉnh Yên Bái Chemical and Industrial Park, the factory covers an area of 30,000 m2 with a total investment of 4 million USD, and we are the most professional fine chemical manufacturer in Vietnam, we are committed to continuous improvement of quality and the development of new products, we have our own research and quality inspection departments, our factory is also a cooperative unit of Vietnam Chemical Institute; we are committed to serving our customers with stable and high quality products as well as commercial business credit. Our mission is to fulfill your needs!

Double decomposition method: add potassium iodide solution with relative density of 1.1 into the reactor, and slowly add silver nitrate solution with relative density of 1.1 to 1.2 while stirring vigorously until the potassium iodide solution is excessive by about 3%. At this time, a yellow silver iodide precipitate is formed, which is left standing, filtered, washed with distilled water, centrifuged, and dried at below 70° C. to obtain a finished silver iodide product. The operations above KI+AgNO3→AgI↓+KNO3 should be carried out in a dark room or under red light. The filtered mother liquor is recovered, and potassium nitrate is produced as a by-product. The generation methods of silver iodide particles are as follows: (1) Silver iodide generator. Burn the silver iodide acetone solution (with co-solvents such as sodium iodide, potassium iodide or iodide) in the silver iodide generator, so that the silver iodide vapor is cooled and crystallized into particles in the air. (2) Silver iodide pyrotechnic agent. The silver iodide is mixed with the burning agent to make silver iodide flame bombs, fireworks, etc., and a large number of silver iodide particles are formed quickly after burning in the air. (3) Silver iodide shells. Silver iodide, along with explosives, forms particles when the warhead explodes. (4) Silver iodide hydrosol. Formulated with sodium iodide and silver nitrate to form droplets by spraying. The icing rate of silver iodide particles produced by different methods is ver

Artificial precipitation has often entered people's sight recently, so do you know artificial precipitation? Today, Xiaobian will take you to learn two little knowledge about artificial rainfall. Q: Is the silver iodide used for artificial rainfall toxic? A: The catalyst released by silver iodide is calculated to be only about one gram of silver iodide per square kilometer. Artificial precipitation is a microphysical process, not a chemical change that produces new substances. Although the silver ions in silver iodide are heavy metals, the amount of silver iodide is very small, and it is dispersed in a large area, and the content per unit area is very small and almost negligible. Therefore, the silver iodide used in artificial weather modification will not cause harm to the environment and human body. Q: Will the fragments of the rain-enhancing rockets hurt people? A: In accordance with the "Regulations on the Administration of Weather Modification" promulgated by the State Council, the implementation of weather modification operations must be carried out within the approved airspace and operation time limit, in strict accordance with the operation specifications and operating procedures stipulated by the meteorological authority of the State Council, and accepted by the county The command, management and supervision of the local meteorological authority above the level to ensure the safety of operations. The material of rain-enhancing rockets is very special. It is different from artillery shells and rockets used in combat. The shell and warhead are non-metallic, but fibrous. The fragments formed

Manganese chloride tetrahydrate suppliers, manganese chloride Anhydrous manganese chloride is mainly used in pharmaceutical, gasoline antiknock, magnesium alloy and other industries. Manganese chloride tetrahydrate is mainly used in medicine, feed, food, ceramics and other industries. Used in the manufacture of feed aids, analytical reagents, dyes and pigments. Magnesium alloy, aluminum alloy smelting, brown-black brick production, pharmaceutical and dry battery manufacturing. It is also used as a trace element fertilizer in agriculture. Our products with exclusive competitive edge are: explosive and detonation devices, High purity nitrate series, high purity strontium barium salt series, phosphorus chemical products series, electronic and fluorescent water application products series, chemical reagents and p-nitrobenzoic acid and etc., customized products and special products can be produced according to customer needs and requirements. Vietnam Fine Chemical Link-win Factory is located in Tỉnh Yên Bái Chemical and Industrial Park, the factory covers an area of 30,000 m2 with a total investment of 4 million USD, and we are the most professional fine chemical manufacturer in Vietnam, we are committed to continuous improvement of quality and the development of new products, we have our own research and quality inspection departments, our factory is also a cooperative unit of Vietnam Chemical Institute; we are committed to serving our customers with stable and high quality products as well as commercial business credit.

Bromide refers to compounds containing bromine in oxidation state -1, including hydrogen bromide, ammonium bromide, metal bromides, and non-metal bromides. The properties are between chloride and iodide. Bromide ion is the preferred reducing agent. The stability of complex formation is between that of iodine and chlorine. Most are easily soluble in water, but the bromides of copper (I), silver (I), mercury (I) and lead (II) are more difficult to dissolve. Clinically, bromide usually refers to potassium bromide, sodium bromide and ammonium bromide, commonly known as "tribromide". In addition, silver bromide is used in photographic film and photosensitive paper, and copper bromide can be used as a brominating agent in organic synthesis. Metal bromides can be prepared by the direct combination of bromine and metals (such as aluminum bromide) or by the interaction of hydrobromic acid with metal hydroxides (or their salts). SolubilityEdit Alkali metal, alkaline earth metal bromide and ammonium bromide are easily soluble in water. Poorly soluble bromides are similar to poorly soluble chlorides, but are generally less soluble than the corresponding chlorides. An aqueous solution of hydrogen bromide is called hydrobromic acid, which is a strong acid. Metal bromides can be prepared from the corresponding carbonates or hydroxides with hydrobromic acid. Such as: sodium bromide, manganese bromide, barium bromide, copper bromide, magnesium bromide, thallium bromide, mercury bromide and so on. We are mainly engaged in the research and development, production and management of high purity and reagent chemicals. The main products of our company are: Nitrate, chromate, Acetate, Oxalate, Bromide, P-Nitrobenzoic acid,please contact us.

Basic copper carbonate is malachite green, so it is also called malachite. It is a precious mineral gem. It is a substance produced by the reaction of copper with substances such as oxygen, carbon dioxide and water vapor in the air, also known as patina, and its color is emerald green. Heating in air will decompose to copper oxide, water and carbon dioxide. Soluble in acid and generate the corresponding copper salt. It exists in nature in the form of malachite. Chinese name Basic copper carbonate English name Cupric subcarbonate Other name Basic copper carbonate Chemical formula Cu₂(OH)₂CO₃ Molecular weight 221.076 CAS registration number 12069-69-1 EINECS registration number 235-113-6 Melting point 220ºC Water-soluble Insoluble in water and alcohol. Density 3.85g/mL Appearance Malachite green fine amorphous powder Application Organic catalyst, pyrotechnics, pigment, etc. Safety description S26/36 Hazard description R22/36/37/38 Toxicity Toxic Commonly known as patina or patina. We are mainly engaged in the research and development, production and management of high purity and reagent chemicals. The main products of our company are: Nitrate, chromate, Acetate, Oxalate, Bromide, P-Nitrobenzoic acid, if you have any noods, please contact us.

Manganese carbonate, or manganese carbonate, is an inorganic compound, carbonate of divalent manganese, with the chemical formula MnCO3. Soluble in dilute acid, insoluble in water and ethanol. Manganese carbonate is the raw material for the manufacture of soft ferrite for telecommunication equipment, the synthesis of manganese dioxide and the manufacture of other manganese salts. Used as a catalyst for desulfurization, as a pigment for enamels, coatings and varnishes. Also used as fertilizer and feed additive. It is used in medicine, welding rod accessories, etc., as raw material for the production of electrolytic manganese metal. physical properties Rose triangular rhombohedral crystal or amorphous bright white brown powder. Relative density 3.125. Almost insoluble in water, slightly soluble in water containing carbon dioxide (ie carbonic acid), insoluble in alcohol and liquid ammonia. chemical properties Soluble in dilute inorganic acids, slightly soluble in common organic acids. Stable in dry air. It is easily oxidized when wet, forms manganese trioxide and gradually turns brown-black, and releases carbon dioxide when heated. It is hydrolyzed when it azeotropes with water. In boiling potassium hydroxide, manganese hydroxide is formed. Packaging, storage and transportationEdit Packed in wooden barrels lined with polyethylene plastic bags, with a net weight of 50kg per barrel. It should be stored in a cool, ventilated and dry warehouse. Should be protected from moisture, heat and deterioration. Protect from rain and sunlight when transporting. When loading and unloading, handle with care to prevent the package from being

Sulfuric acid (especially in high concentrations) can do great damage to flesh. Just like other corrosive strong acids and bases, sulfuric acid can rapidly undergo amide hydrolysis and ester hydrolysis with proteins and fats, thereby decomposing biological tissues and causing chemical burns. However, its strong corrosiveness to the body is also related to its strong dehydration, because sulfuric acid also dehydrates with carbohydrates in biological tissues and releases a lot of heat. In addition to causing chemical burns, second-degree flaming burns can also be caused. Therefore, the damage caused by sulfuric acid is often greater than that of other comparable strong acids (such as hydrochloric acid and nitric acid). If you accidentally let sulfuric acid come into contact with the eyes, it may cause permanent blindness; and if you accidentally swallow it, it will cause irreversible damage to the internal organs, and even fatal. Concentrated sulfuric acid also has strong oxidizing properties and will corrode most metals, so it needs to be stored carefully. As the concentration increases, so does the danger of sulfuric acid. This is because in addition to the increase in the proportion of acidic substances, its dehydration and oxidation properties are also increasing. When the sulfuric acid content of a solution is equal to or exceeds 1.5 M, a "corrosive" warning label should be attached, and between 0.5 and 1.5 M, it is "irritating". However, even the "low concentration" sulfuric acid (about 1 M, 10% specific gravity) customary in the laboratory will erode through the paper over time. In the old textbooks, in order to prevent the concentrated sulfuric acid from releasing a lot of heat a

Lead nitrate, IUPAC Chinese name is lead (II) nitrate, is a lead nitrate, usually in the form of colorless crystals or white powder. Unlike other divalent lead salts, lead nitrate is soluble in water. We usually react metallic lead or lead oxide with nitric acid to obtain lead nitrate, and then further synthesize other lead compounds. Historically, lead nitrate was known under the name Plumb dulcis from the Middle Ages, when the production of lead nitrate from metallic lead or lead oxide by nitric acid was small-scale. By the 19th century, lead nitrate was commercialized in Europe and the United States. At that time, it was mainly used as the main raw material for the manufacture of pigments, but because it was toxic, it was gradually replaced by the less toxic titanium dioxide. Other industrial uses are as heat stabilizers in nylon, polyester and thermal imaging paper coatings. Lead nitrate has been used in cyanide alchemy since about 2000. Lead nitrate is toxic, an oxidant, and is classified as a Group 2A carcinogen by the International Agency for Research on Cancer. Therefore, it must be handled and stored with appropriate safety measures to prevent inhalation, ingestion and skin contact. Due to its hazard, the use of lead nitrate is still under consideration. Storage conditions: The warehouse is ventilated and dry at low temperature, lightly loaded and unloaded, and stored separately from organic matter, reducing agent, sulfur and phosphorus flammables. Besides, our company also sells Nitrate, chromate, Acetate, Oxalate, Bromide, and P-Nitrobenzoic acid.

Copper(II) acetate monohydrate, and similar Rh(II) and Cr(II) tetraacetates all adopt a "Chinese lantern" structure. As shown in the figure, one oxygen atom of each acetate is bonded to one copper atom, and the Cu-O bond length is 197pm; two water molecule ligands occupy the upper and lower sides, and the Cu-O bond length is 220pm. The distance between two five-coordinated copper atoms is 265pm, which is close to the Cu-Cu distance (255pm) in metallic copper. This Cu2(OAc)4(H2O)2 dimerization unit structure is mainly combined by hydrogen bonding in the crystal, and other small molecule ligands such as dioxane, pyridine and aniline can replace the water in the above dimer molecular. The two copper atoms interact with each other, and the magnetic moment is 1.40BM at room temperature, but it decreases with the decrease of temperature (such as 0.36BM at 93K), and the magnetic susceptibility shows a maximum value at 253K. The exchange between copper atoms is 286cm-1, indicating that the copper atoms in the dimer are bound by weak covalent bonds. Due to the opposite spin cancellation, Cu2(OAc)4(H2O)2 is essentially diamagnetic, and this structure has an important contribution to the development of modern antiferromagnetic coupling theory. We are mainly engaged in the research and development, production and management of high purity and reagent chemicals. The main products of our company are: Nitrate, chromate, Acetate, Oxalate, Bromide, P-Nitrobenzoic acid,please contact us.

Calcium acetate or calcium acetate salt is a compound composed of calcium, carbon, hydrogen and oxygen. From the appearance, calcium acetate is a white granular powder without any odor. Calcium acetate is commonly used in the production of food and medicine, and is a food additive used as a stabilizer. This compound, while not dangerous, can cause irritating reactions in some people. Acetate is formed from acetic acid and calcium salts. According to the U.S. Food and Drug Administration, there are several levels of safety for this substance. The substance itself is safe, and the Food and Drug Administration also allows calcium acetate to be used in food. As a food coating and ingredient, the substance is not harmful to health when consumed directly. The main use of this compound in the food industry is as a stabilizer. Stabilizers perform many functions in processed foods, and while most involve powdered foods, they are sometimes used in liquid and solid foods as well. In addition to texturizing the flavoring compounds, it also imparts a uniform texture to the product. When used as an emulsifier to bind food ingredients, calcium acetate ensures that the ingredients do not separate. Calcium acetate is used in dairy products such as beverages, condensed milk, milk powder, and cream. Grain and meat fillings, sausage edible casings, and many pasta dishes require this substance to be properly processed and stored. In addition, it can extend the shelf life of food. In medicine, the substance is used to ensure that phosphate levels in the blood of kidney dialysis patients do not rise dangerously high. This medicine is often taken by mouth in tablet form. The most common side effects are nausea, stomach pain, loss of appetite, and nausea an