Operation precautions: closed operation, strengthen ventilation. 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. When handling, it should be lightly loaded and unloaded to prevent damage to packaging and containers. Vibration, impact and friction are prohibited. 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, dry, well-ventilated warehouse. Keep away from fire and heat sources. The packaging is required to be sealed and not in contact with the air. It should be stored separately from combustible materials, etc., and should not be stored together. Storage areas should be provided with suitable materials to contain spills. Packing method: Pack according to the method recommended by the manufacturer, for example: open steel drum. A normal wooden box outside the ampoule. Screw-top glass bottles, iron-covered glass bottles, plastic bottles or ordinary wooden boxes outside metal barrels (cans), etc. Transportation Precautions: The transportation vehicle should be equipped with fire-fighting equipment and leakage emergency treatment equipment of the corresponding variety and quantity. It is strictly forbidden to mix and transport with oxidants, edible chemicals, etc. The exhaust pipe of the vehicle in which this item is shipped must be e

Isolate the leaked contaminated area and restrict access. It is recommended that emergency responders wear self-contained breathing apparatus and protective clothing. Do not come into direct contact with spillage. Do not let the spilled material come into contact with organic substances, reducing agents, and flammable substances. Small spill: Avoid dust, sweep up carefully, collect in a closed container and mark it for disposal. Large spills: Cover with plastic sheeting or canvas to reduce scattering. Then collect for recycling or transport to waste disposal sites for disposal. Protective measures Respiratory protection: When possible exposure to its dust, it is recommended to wear a first-size hood powered air-purifying dust respirator. Eye Protection: Respiratory protection has been covered. Body Protection: Wear polyethylene protective clothing. Hand Protection: Wear neoprene gloves. Others: Smoking, eating and drinking are prohibited at the workplace. After work, take a shower and change clothes. Practice good hygiene. first-aid Skin Contact: Immediately remove contaminated clothing and rinse with plenty of running water for at least 15 minutes. seek medical attention. Eye Contact: Immediately lift eyelids and rinse thorough

Calcium fluoride is an inorganic compound with the chemical formula CaF2, which is a colorless crystal or white powder. It is insoluble in water, slightly soluble in inorganic acid, and reacts with hot concentrated sulfuric acid to generate hydrofluoric acid. Calcium fluoride is generally prepared by the action of calcium carbonate and hydrofluoric acid or by repeatedly treating fluorite powder with concentrated hydrochloric acid or hydrofluoric acid. The natural calcium fluoride mineral is fluorite or fluorite, which is often gray, yellow, green, purple and other colors, sometimes colorless, transparent, vitreous, brittle, and has obvious fluorescence phenomenon. Very pure fluorspar is used to make specialty lenses. Fluorite is mainly used as a flux for metal smelting; when the drinking water contains 1-1.5ppm calcium fluoride, it can prevent dental diseases. Physical and chemical properties Crystal structure: is an equiaxed crystal system, in the form of cube, octahedron or dodecahedron. Colorless crystal or white powder, natural ore contains impurities, slightly green or purple. Glows when heated. The density is 3.18g/cm3, the melting point is 1402℃, the boiling point is 2500℃, and the refractive index is 1.434. Low toxicity. Extremely insoluble in water. Soluble in hydrochloric acid, hydrofluoric acid, sulfuric acid, nitric acid and ammonium salt solution, insoluble in acetone. When dissolved in aluminum salt and iron salt solution, it forms a complex, and reacts with hot concentrated sulfuric acid to generate hydrofluoric acid. Calcium fluoride reacts with concentrated sulfuric acid in a lead container to produce hydrogen fluoride. Can form eutectic with a variety of metal oxides. We are mainly engaged in the research and development, production and ma

Fluorite is also known as fluorite. A common mineral in nature, it can coexist with many other minerals, and it is produced in many places in the world. There are 5 effective varieties. Equiaxed crystal system, the main component is calcium fluoride (CaF₂). Crystals are octahedrons and cubes. The crystal is vitreous, bright and changeable in color, brittle, with a Mohs hardness of 4 and a melting point of 1360 °C, which has the property of complete cleavage. Some samples can emit light when subjected to friction, heating, ultraviolet radiation, etc. The mineral comes from volcanic magma. During the cooling process of the magma, the gas solution separated by the magma contains fluorine. During the process of the solution rising along the crack, the fluoride ions in the gas solution combine with the calcium ions in the surrounding rocks to form fluoride. Calcium forms fluorite after cooling and crystallization. Exist in granite, pegmatite, syenite and other rocks. It is not often used as a gem due to its brittleness and softness. In industry, fluorite is the main source of fluorine, which can be extracted to prepare fluorine and its various compounds. The fluorite specimens with bright colors and beautiful crystal forms can be used for collection, decoration and carving crafts. Formation process Fluorite comes from the remnants of volcanic magma. During the cooling process of the magma, the gas-water solution separated by the magma contains many substances, mainly fluorine. The fluoride ions in the fluoride combine with the calcium ions in the surrounding rocks to form calcium fluoride.

85g of strontium nitrate Sr(NO3)2 was heated and dissolved in 500mL of water, and 20mL of concentrated sulfuric acid with a relative density of 1.84 was added to 30mL of water to make a dilute acid solution. The sulfuric acid solution is slowly added to the strontium nitrate solution under stirring, and the strontium sulfate can be precipitated. Continue heating in the water bath for a while to make the precipitate completely mature, add an appropriate amount of water, wash the precipitate, let it stand, and pour out the supernatant. After repeated washing several times, filter through a microporous glass filter. After washing 2-3 times with a small amount of water, it was dried at 200°C. The yield can reach more than 95%. Strontium sulfate can be prepared by the lapis lazuli purification method. If high-purity products are needed, sulfuric acid or alkali metal sulfates can be added to the aqueous solution of soluble strontium salts (such as strontium chloride or strontium nitrate), and large needle-like crystalline hydrous salts are initially precipitated from the concentrated solution. water salt 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.

Ammonium dihydrogen phosphate is mainly used as a fire retardant for phosphate fertilizer and wood, paper, and fabrics (such as a fire extinguisher for matchsticks and candle wicks), and is also used for making medicines. Also used as a ruminant feed additive. By phosphoric acid and ammonia for acid and base reaction in the system. Stable in air. When the temperature is higher than the melting point, it decomposes and loses ammonia and water, forming ammonium metaphosphate and phosphoric acid and a mixture. There is a small part of decomposition at 100 °C. Production Process Ammonium monohydrogen phosphate metathesis method. The technological process of preparing ammonium dihydrogen phosphate by reacting phosphoric acid with ammonium bicarbonate and then reacting with potassium chloride to generate potassium monohydrogen phosphate. It is obtained by feeding water, potassium chloride and ammonium bicarbonate in proportion, then adding a prescribed amount of phosphoric acid, fully stirring, adjusting the pH value, heating and concentrating to 110°C, cooling, crystallization, centrifugation, drying, and centrifugation. The concentrated mother liquor is a multi-element compound fertilizer containing nitrogen, phosphorus and potassium. 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.

Health Hazards: Local irritation and systemic toxicity. Progressive muscle paralysis, cardiac arrhythmia, and decreased blood pressure may occur after ingestion, and may die of cardiac arrhythmia and respiratory muscle paralysis. Long-term exposure can cause stomatitis, rhinitis, conjunctivitis, hair loss, etc. Explosion Hazard: This product is flammable. first-aid Skin Contact: Remove contaminated clothing and rinse with plenty of running 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. Gastric lavage with 2% to 5% sodium sulfate solution for catharsis. seek medical attention. Fire-fighting measures Hazardous characteristics: In case of open flame, high heat, or contact with oxidants, it can burn and emit toxic gas. Hazardous combustion products: carbon monoxide, carbon dioxide, barium oxide. Extinguishing method: Move the container from the fire area to an open area as much as possible. Extinguishing media: water mist, foam, dry powder, carbon dioxide, sand. Emergency release treatment

Operation precautions: closed operation, full ventilation. Prevent dust from being released into the workshop air. 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, gas-penetrating protective clothing, and chemical-resistant gloves. Keep away from fire and heat sources, and smoking is strictly prohibited in the workplace. Use explosion-proof ventilation systems and equipment. Avoid generating dust. Avoid contact with oxidants and acids. 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. Protect from direct sunlight. Package is sealed. It should be stored separately from oxidants and acids, and should not be mixed. Equipped with the appropriate variety and quantity of fire equipment. Storage areas should be provided with suitable materials to contain spills. Packing method: plastic bag or two-layer kraft paper bag with full opening or middle-open steel drum; plastic bag or two-layer kraft paper bag outside fiberboard drum, plywood drum, cardboard drum; plastic bag or two-layer kraft paper bag outside ordinary wooden box; thread Ordinary wooden case outside the mouth glass bottle, iron lid crimping glass bottle, plastic bottle or metal barrel (can); threaded glass bottle, plastic bottle or tin-plated sheet steel barrel (can) outside the full bottom lattice box, fiberboard box or Plywood boxes. Transportation precautions: Before transportation, check whether the packaging container is complete and sealed. During transportation, make sure that the

Silver iodide is an inorganic substance with a chemical formula of AgI. It is a bright yellow odorless microcrystalline powder. There are two types of α and β. . β-type is a hexagonal crystal with a density of 5.683g/cm3, and it turns into α-type when heated to 146°C. Insoluble in dilute acid, water, slightly soluble in ammonia, easily soluble in potassium iodide, potassium cyanide, sodium thiosulfate and methylamine, regardless of solid or liquid silver iodide, it has photosensitive properties, can sense wavelengths from ultraviolet to about 480 mm light in between. Under the action of light, it is decomposed into very small particles of "silver core", which gradually become greenish gray-black. When heated with ammonia water, it turns white due to the formation of silver iodide-ammine complex crystals. chemical properties α type is bright yellow hexagonal crystal. Soluble in potassium cyanide, sodium thiosulfate, potassium iodide, slightly soluble in concentrated ammonia. Silver iodide has α, β and γ phases. β and γ are relatively stable at room temperature, and the α phase has higher electrical conductivity, but it is difficult to exist at low temperature. The β phase is a hexagonal crystal, and the γ phase is a cubic crystal. Above 146 degrees Celsius, the alpha phase gradually becomes dominant, and it is a body-centered cubic crystal. 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,

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 melts at 180-200°C and decomposes into nickel, carbon monoxide, carbon dioxide, hydrogen, water and methane at 210°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. physicochemical properties Shape: green crystal Relative density: 2.154. Solubility: 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. 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.

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", which can strengthen the inhibitory process of the cerebral cortex, and can adjust the balance between excitation and inhibition process, resulting in a sedative effect . 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). Solubility 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, productio

Copper carbonate is a copper carbonate, a blue-green powdery solid. There is no copper carbonate in the aqueous solution, and the copper carbonate is immediately double hydrolyzed into a mixture of copper hydroxide and basic copper carbonate when it encounters water (the specific product depends on the acidity and alkalinity of the solution). The degree of hydrolysis of copper carbonate is very large. It is hydrolyzed to form copper hydroxide and water. Copper carbonate can also be combined with the copper hydroxide generated by hydrolysis to form basic copper carbonate. Therefore, in the solution, there is no copper carbonate, but copper hydroxide. and in the form of a small amount of basic copper carbonate. Copper carbonate physical properties Bright red malachite and blue azurite are two types of basic copper carbonates that occur naturally. The density of copper carbonate is estimated to be about 3.9g/cm3, the melting point is about 200°C, and there is no boiling point (decomposition by heat). Boiling point: 333.6℃ at 760 mmHg, flash point: 169.8℃, vapor pressure: 2.58E-05mmHg at 25℃ The main use of copper carbonate Preparation of other copper salts. Solid phosphor activator. Insecticide. Seed treatment fungicides. The paint pigment copper carbonate has no practical application, and the basic copper carbonate can be used to prepare other copper salts, solid phosphor activators, insecticides, seed treatment fungicides, paint pigments, etc. 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: Nit

Packing method: plastic bag or two-layer kraft paper bag with full opening or middle-open steel drum; plastic bag or two-layer kraft paper bag outside fiberboard drum, plywood drum, cardboard drum; plastic bag or two-layer kraft paper bag outside ordinary wooden box; thread Ordinary wooden case outside the mouth glass bottle, iron lid crimping glass bottle, plastic bottle or metal barrel (can); threaded glass bottle, plastic bottle or tin-plated sheet steel barrel (can) outside the full bottom lattice box, fiberboard box or Plywood boxes. Transportation Precautions: Before transportation, check whether the packaging container is complete and sealed. During transportation, make sure that the container does not leak, collapse, fall or be damaged. It is strictly forbidden to mix with acids, oxidants, food and food additives. During transportation, the transport vehicle shall be equipped with the corresponding variety and quantity of fire fighting equipment and leakage emergency treatment equipment. During transportation, it should be protected from exposure to sunlight, rain, and high temperature. When transporting by road, it is necessary to drive according to the prescribed route, and do not stop in residential areas and densely populated areas. 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.

After being neutralized by pyrolignoic acid (wood acetic acid) and calcium hydroxide, the filtrate is evaporated to dryness and recrystallized to obtain;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; Using shell as raw material, after cleaning, crushing and drying for 1 hour, roasting at 900~1000℃ for 2 hours, and then adding 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 the 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↑ Method for anhydrous calcium acetate: add the refined powdered calcium carbonate to water, stir to form a suspension, and add a small amount of glacial acetic acid in stages. After the reaction finished, the filtrate was concentrated on a water bath, and a white solid, namely anhydrous calcium acetate, was separated out from the viscous filtrate;

Lead nitrate is an inorganic compound with the chemical formula Pb(NO3)2. It is lead nitrate. It is a white cubic or monoclinic crystal, hard and shiny, and easily soluble in water. Mainly used in the manufacture of lead salt, mordant, fireworks, etc. Since the Middle Ages, lead nitrate has been used as a raw material for the production of lead-containing pigments such as chrome yellow (lead chromate), chrome orange (a mixture of lead chromate and lead oxide) and related lead compounds. These pigments are used in the dyeing of textiles such as calicos. In 1597, the German alchemist Andreas Libafius described lead nitrate for the first time. It was named after plumb dulcis and calx plumb dulcis, which literally means "sweet lead", derived from nitric acid. The taste of lead. Although the other properties of this substance were not well understood at first, in the following centuries, people used lead nitrate to synthesize matches and special explosives based on the decrepitation of lead nitrate burning. Above, for example, lead nitrate and sodium azide are used to synthesize lead azide. Historically, the process of producing lead nitrate was a simple chemical reaction. Generally, lead is dissolved in concentrated nitric acid, and the subsequent precipitate is lead nitrate. However, even though the production method is simple, small-scale production has continued for many centuries, and the commercial production of lead(II) nitrate as a raw material for the manufacture of other lead compounds has not been documented until 1835. In 1974, the consumption of lead compounds in the United States, which did not contain pigments and gasoline additives, was 642 tons.

The crystal structure of lead nitrate has been determined by neutron diffraction. The lead atoms are piled up in the form of face-centered cubic in the cubic crystal system. Its space group is Pa3Z=4 (Braffe lattice notation), and the side length of each unit cell is 784pm. In this figure, the black dots represent lead atoms, the white dots represent nitrate ions that are 27 pm higher than the lead atomic plane, and the blue dots represent nitrate ions that are 27 pm lower than the lead atomic plane. In this state, each lead atom is bonded with 12 oxygen atoms, and the bond lengths of all N–O bonds in the crystal are the same, all of which are 127pm. I was interested in the crystal structure of lead nitrate before to study it, part of the reason is that the nitrate ions inside the crystal lattice may be able to rotate freely at high temperatures, but this prediction was not confirmed in the end. use Glass lining industry is used to make milk yellow pigment. The paper industry is used as the yellow pigment of paper. Used as a mordant in the printing and dyeing industry. In the inorganic industry, it is used in the manufacture of other lead salts and lead dioxide. The pharmaceutical industry is used to manufacture astringents and so on. Benzene industry is used as a tanning agent. The photographic industry is used as a photo sensitizer. Used in the mining industry as an ore flotation agent. In addition, it is also used as an oxidant for the production of matches, fireworks, explosives, and analytical chemical reagents. We are mainly engaged in the research and development, production and management of high purity and reagent chemic

Magnesium acetate is an organic salt with the structural formula Mg(CH3COO)2. It is usually a tetrahydrate with a colorless monoclinic crystal in appearance and a density of 1.454 g/cm3 (the density of anhydrous is 1.42 g/cm3). Easily soluble in water, the aqueous solution is neutral or weakly acidic, and soluble in crystal water at 80°C. Deliquescence in humid air, weathering in concentrated sulfuric acid dryer, dehydration at 100°C. Used as an analytical reagent to prepare sodium acyl magnesium acetate to determine the content of sodium in the substance. It is also used in medicine, catalyst, etc. Magnesium carbonate can be reacted with acetic acid and concentrated to precipitate magnesium acetate crystals. 1. It is obtained by co-heating magnesium nitrate and acetic acid. The magnesium nitrate and anhydrous acetic acid are heated together. After the reaction is terminated, the solution is boiled for another 20 minutes. Anhydrous magnesium acetate precipitates out after long-term storage. Filter by suction, wash with a small amount of absolute ethanol, then wash with ether, and dry in a vacuum drying oven at 60°C. The crystal contains free acetic acid and should be dried for a long time until constant weight. Magnesium acetate tetrahydrate can also be heated to constant weight at 134°C to obtain anhydrous magnesium acetate. 2. It is derived from the reaction of magnesium carbonate and acetic acid. Add 80% acetic acid to water, heat to 60-80°C, add magnesium carbonate in small portions until carbon dioxide no longer escapes. Place the solution on a water bath, heat and concentrate to a relative density of 1.25-1.26, then cool. The crystals are filtered out to obtain magnesium acetate tetrahydrate. 3. Dilute 90mL of 80% acetic acid with 180mL of water, heat it to 60~80℃ on a water bath, add magnesium carbonate in small quantities under stirring until carbo

It is not precipitation, the solubility of barium acetate is soluble. Barium acetate is a chemical substance with the molecular formula (CH3COO)Ba. The appearance is colorless to white crystalline powder, mainly used for calcium salt analysis, sulfate and chromate precipitation agent and organic reaction catalyst. Physical properties: The appearance is colorless to white crystalline powder, easily soluble in water, insoluble in ethanol, and decomposes when heated to 450°C. When barium acetate is recrystallized from water, the crystals are precipitated as trihydrate when the temperature is below 24.7°C. At 24.7~41℃, the crystals are precipitated as monohydrate. The crystals precipitated above 41°C are anhydrous. At 0°C, 59g of barium acetate can be dissolved in 100g of water. At 24.1℃, 78.1g of barium acetate can be dissolved in 100g of water. At 100°C, 75g of barium acetate can be dissolved in 100g of water. The density is 2.468g/cm3. Chemical properties: When heated in air, barium acetate will decompose into carbonate. It reacts with acid, and reacts with sulfuric acid, hydrochloric acid and nitric acid to form the corresponding sulfate, chloride and nitrate. Storage with strong oxidants may cause explosion hazard. 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.

Celestite ore is mainly used to produce strontium carbonate, followed by strontium nitrate, strontium chromate, strontium titanate, strontium phosphate, strontium sulfate, strontium chloride, and can also extract metal strontium. Strontium and strontium salts are widely used in electronics, metallurgy, non-ferrous, electrical, national defense, glass, medicine, sugar and other industrial sectors. Strontium carbonate can be used as a coating for the fluorescent screen of a color TV picture tube, which can not only greatly reduce X-ray radiation, but also improve the clarity of the picture and the authenticity of the color tone. Used in the electrical industry to manufacture strontium ferrite ceramic materials and atomic batteries. In the metallurgical industry, strontium and strontium salts can be used as desulfurization and dephosphorization agents in steelmaking, and can improve pig iron performance and steel quality in ferrosilicon production. In the national defense industry, it is used to manufacture signal flare, tracer and fireworks. In addition, it can also be used as a reducing agent for refractory metals, a degassing agent for vacuum tubes, a catalyst for artificial diamonds, a lubricant, and special alloy materials. In recent years. Strontium, lanthanum, and copper oxides can be used as important metals to compose superconducting ceramics, and saturated solutions are used to test barium. Fireworks manufacturing. Used as an additive for glass and ceramics, and also as a degassing agent for vacuum tubes, etc. Strontium sulfate is generally used to prepare a self-adjusting chromium plating solution to control the content of chloride ions and free sulfate ions.

Sulfate in water is a common substance, which is widely present in various natural water bodies. It is mainly formed through the slow penetration of formation minerals into the groundwater. Therefore, the concentration of sulfate in the water quality of different environments is different. Before, we introduced the gravimetric method to detect sulfate in water, but this type of method is suitable for boiler water, industrial cold circulating water, and other water samples with a content of less than 10mg/L. To detect sulfate in natural water samples such as river water and lake water, we can use the barium chromate photometric method. The principle is that in an acid 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 a precipitated state, and the precipitate is removed by filtration. Under alkaline conditions, the chromate ion appears yellow, and the content of sulfate can be known by measuring its absorbance. 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.

1. The p-toluidine is treated with acetic anhydride to convert it into the corresponding amide. The purpose is to protect the amino group in the potassium permanganate oxidation reaction in the second step to prevent the amino group from being oxidized. The formed amide is stable under the oxidation conditions used. 2. The methyl group in p-methylacetanilide is oxidized to the corresponding carboxyl group by potassium permanganate. During the oxidation process, the purple permanganate is reduced to a brown manganese dioxide precipitate. In view of the generation of hydroxide ions in the solution, a small amount of magnesium sulfate should be added as a buffer to prevent the solution from becoming too alkaline and hydrolyzing the amide group. The reaction product is a carboxylic acid salt, and the resulting carboxylic acid can be precipitated out of the solution after acidification. 3. Use amide hydrolysis to remove the protective acetyl group. This reaction is easily carried out in a dilute acid solution. 4. Using p-aminobenzoic acid and ethanol, under the catalysis of concentrated sulfuric acid, prepare ethyl p-aminobenzoate. 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.

Protective measures, protective equipment and emergency procedures for workers: It is recommended that emergency workers wear air-carrying respirators, anti-static clothing, and rubber and oil-resistant gloves. Do not touch or cross the spill. All equipment used during operation should be grounded. Cut off the source of leakage as much as possible. Eliminate all ignition sources. According to the influence area of liquid flow, steam or dust diffusion, the warning zone shall be delineated, and the unrelated personnel shall be evacuated from the crosswind and upwind to the safe area.Environmental protection measures: contain the leakage to avoid environmental pollution. Prevent leaks from entering sewers, surface water and groundwater. The containment and removal methods of the leaked chemicals and the disposal materials used: ①Small amount of leakage: collect the leaking liquid in a container as much as possible. Absorb with sand, activated carbon or other inert materials, and move to a safe place. Do not flush into the sewer. ②A large number of leaks: build a dike or dig a pit for storage. Close the drainage pipe. Cover with foam to prevent evaporation. Use explosion-proof pump to transfer to tank truck or special collector, recycle or transport to waste disposal site for disposal. Fire extinguishing agents can also be used. Extinguishing agent: fire extinguishing agent with water mist, dry powder, foam or carbon dioxide. Avoid using direct water to extinguish fires. Direct water may

As a new type of high-energy green chemical power source, lithium-ion batteries have the advantages of high working voltage, large specific energy, long cycle life, low self-discharge rate, wide temperature range, no memory effect, and environmental friendliness. In recent years, 3G mobile phones The development of portable energy storage devices such as, energy storage devices, electric vehicles, and electric bicycles has promoted the rapid development of the lithium battery industry. Ferrous oxalate, as a raw material for the synthesis of lithium iron phosphate, a cathode material for lithium-ion batteries, has attracted widespread attention. With the vigorous development and wide application of lithium iron phosphate power batteries in new energy vehicles and energy storage batteries, the market capacity of its raw material, ferrous oxalate, will also rapidly expand, and the market prospect is very broad. The purity and particle size of ferrous oxalate have a great influence on the performance of synthetic lithium iron phosphate. If the purity of ferrous oxalate is too low, the impurities such as K+, Na+, SO and oxidized Fe'+ will not only affect Reducing the electrochemical capacity and cycle performance of lithium iron phosphate will also greatly affect the batch stability of the product; if the particle size of ferrous oxalate is too large, on the one hand, it will affect the uniformity of the mixture, on the other hand, it will cause the formation of Lithium iron phosphate material has large particles and poor conductivity, which is not conducive to high-current charging and discharging, thereby limiting its application in high-power lithium-ion batteries. Studies have reported that the ultrafine ferrous oxalate powder has a higher specific surface area, so the r

Ammonium oxalate is soluble in water and slightly soluble in ethanol. The aqueous solution is acidic. In the laboratory, ammonium oxalate can form precipitates with calcium and magnesium ions in the solution, and the calcium and magnesium ions in the solution can be removed by filtration. Next, let's talk about what ammonium oxalate should pay attention to. 1. Hazard category Invasion route: inhalation, ingestion, transdermal absorption. Health hazards: Harmful in contact with skin and if swallowed. Environmental hazards: No information. Explosion hazard: non-combustible. 2. First aid measures Skin contact Take off contaminated clothing and rinse thoroughly with clean water. See a doctor if needed. Eye contact: Lift the eyelid immediately and rinse with plenty of running water for at least 10 minutes. Seek medical attention. Inhalation: quickly leave the scene to a place with fresh air. Ingestion: Let the victim drink enough water, induce vomiting, and seek medical attention. 3. Fire Fighting Measures Hazardous characteristics: non-combustible. Hazardous combustion products: Hazardous vapors can be formed in the surrounding fire. Can form: Nitric oxide Fire extinguishing method and extinguishing agent: select a fire extinguisher suitable for the surrounding fire source. Precautions for fire extinguishing: Please do not stay in the dangerous area without chemical protective clothing and ox