Lead chromate, chemical formula PbCrO4, is a yellow crystal powder. It is an inorganic compound consisting of lead ions and chromate ions. Lead chromate is a relatively stable compound that does not decompose at room temperature. It is a strong oxidizing agent that can undergo oxidation reactions with other substances. Lead chromate can be used to make pigments, such as yellow chrome lead pigment, which has a wide range of applications in art and industry. In addition, lead chromate can also be used in analytical chemistry as a quantitative analysis reagent for lead and chromium. However, lead chromate is a toxic compound that is harmful to humans and the environment and should be used with care and disposed of properly. Lead chromate can also be used in electroplating, cosmetics, and pharmaceuticals in industry. In the electroplating process, it can be used as an electrolyte to form a yellow lead chromate film on the metal surface, thereby improving the corrosion resistance and aesthetics of the metal. In cosmetics and pharmaceuticals, lead chromate is used as a pigment and colorant in products such as lipstick and eye shadow. However, lead chromate is toxic and carcinogenic, which is harmful to human body and environment. Therefore, when using lead chromate, relevant safety regulations should be followed, such as wearing protective gloves and masks, etc. At the same time, the discharge and treatment of lead chromate should be strictly controlled to avoid pollution to the environment.

Nickel formate is a chemical compound with the formula Ni(HCOO)2. It is a coordination complex containing nickel(II) ions coordinated to two formate (HCOO-) ions. It can be prepared by reacting nickel(II) chloride or nickel(II) nitrate with sodium formate or potassium formate in water. Nickel formate is a green crystalline solid that is slightly soluble in water. It has been used as a catalyst in various chemical reactions, including the hydrogenation of alkenes and the synthesis of organic compounds. It has also been studied as a potential material for gas separation and as a precursor for the synthesis of nickel nanoparticles. Nickel formate has a unique crystal structure, which makes it an interesting material for research in the field of crystal engineering. The crystal structure of nickel formate consists of layers of Ni(HCOO)2 units stacked on top of each other. The layers are held together by weak van der Waals forces, which makes the material relatively soft and easily cleaved. Nickel formate can also be used as a precursor for the synthesis of nickel oxide (NiO) nanoparticles. The nanoparticles can be synthesized by thermal decomposition of nickel formate in the presence of a surfactant. The resulting NiO nanoparticles have been used in various applications, including catalysis, gas sensing, and energy storage. In addition, nickel formate has been studied as a potential material for gas separation. It has been shown to have high selectivity for carbon diox

Lead nitrate is a chemical substance with the chemical formula Pb(NO3)2. It is a white crystal, easily soluble in water. Lead nitrate is an important inorganic chemical widely used in pigments, dyes, electronics, cosmetics, medicine and other fields. Lead Nitrate is mainly used as a raw material for white pigments in the field of pigments and dyes. In the field of electronics, lead nitrate is often used in the manufacture of capacitors, electrodes and other components. In cosmetics, lead nitrate is also used as a whitening ingredient. In addition, lead nitrate is also used in the field of medicine, mainly for the preparation of certain pharmaceutical raw materials. Although lead nitrate has a wide range of applications, it is also somewhat toxic. Lead nitrate is irritating and corrosive to the skin, eyes, respiratory tract, etc., and can also cause damage to the nervous system and liver of the human body. Therefore, strict safety measures are required when handling and using lead nitrate, such as wearing appropriate personal protective equipment, avoiding inhalation and contact, enhancing ventilation, etc. When discarding lead nitrate, relevant laws and regulations should also be followed, and safe and environmentally friendly disposal methods should be adopted to reduce the impact on the environment and human body. In addition, lead nitrate has some other properties. For example, lead nitrate has good solubility and stability, and can be stored for a long time without decomposition. Under the action of light, l

Copper formate tetrahydrate is a chemical substance with the chemical formula [Cu(HCOO)2]·4H2O. It is a blue crystal, soluble in water and ethanol, and is commonly used as a catalyst and fungicide. It can also be used to prepare other copper compounds and dyes. However, it should be noted that copper formate tetrahydrate is toxic to the human body, and it may cause skin and eye irritation after contact, and may cause respiratory discomfort after inhalation. Therefore, it is necessary to strictly abide by the safety operation regulations and take necessary protective measures during use. Copper formate tetrahydrate is mainly used in the following fields: Catalyst: Copper formate tetrahydrate can be used as a catalyst in many organic synthesis reactions, such as: carbene reaction, olefin cyclization reaction, aromatization reaction, etc. Among the catalysts, the catalytic activity of copper formate tetrahydrate is very high, and it has good stability and selectivity. Bactericide: Copper formate tetrahydrate has a strong bactericidal effect on some fungi and bacteria, so it is widely used in agricultural and household cleaning products. For example: it can be used to make pesticides and fungicides, it can be used to disinfect fruits and vegetables, and it can also be used to clean kitchens and bathrooms. Preparation of copper compounds and dyes: copper formate tetrahydrate can be used as the precursor of copper compounds and dyes, for exampl

Anhydrous strontium chloride is a colorless crystalline powder with a molecular formula of SrCl2, which is a chloride compound of strontium. Anhydrous strontium chloride has a wide range of applications in the chemical industry, such as raw materials for the manufacture of strontium compounds, battery materials, antiseptics, catalysts, optical glass and phosphors, etc. Anhydrous strontium chloride can be dissolved in water to generate Sr2+ and Cl- ions, and these ions will form ionic crystals in water, which can be used in the manufacture of phosphors. In addition, anhydrous strontium chloride can also be used to produce other strontium compounds such as strontium barium sulfate, strontium acid and strontium salt. Although anhydrous strontium chloride has certain uses in industry, it should be noted that it is harmful to the human body and the environment. Therefore, when using anhydrous strontium chloride, it is necessary to follow safe operating procedures to avoid unnecessary harm to the human body and the environment. When purchasing anhydrous strontium chloride, you need to pay attention to the following aspects: Purity: High-quality anhydrous strontium chloride should have a relatively high purity, which is usually required to reach more than 99%. Lower purity may affect its performance and application effect. Packaging: Anhydrous strontium chloride is usually sold in pl

Manganese Chloride Tetrahydrate is an inorganic compound with a chemical formula of MnCl2·4H2O. It is a white crystal that is easily soluble in water and can form hydrates. Manganese chloride tetrahydrate is widely used in the chemical industry. It is an important raw material for the preparation of manganese salts, hydrogen chloride, dyes, and medicine. There are many preparation methods, among which the most commonly used one is the preparation of manganese ore through leaching, oxidation, reduction and other steps. First, mix the manganese ore powder with hydrochloric acid, heat the reaction, and dissolve the manganese element in the manganese ore in hydrochloric acid to form manganese chloride. The manganese chloride solution is then subjected to an oxidation reaction to convert the manganese chloride into manganese chloride tetrahydrate. Finally, pure manganese chloride tetrahydrate crystals are obtained through evaporation crystallization and other processes. There are various applications in the chemical industry. It is an important raw material for the preparation of manganese salts, such as manganese oxide and manganese sulfate. Manganese oxide is an important catalyst, widely used in chemical synthesis, petroleum processing and other fields. Manganese sulfate is an important battery material and is widely used in battery manufacturing. In addition, manganese chloride tetrahydrate can also be used in the production of hydrogen chloride, dyes, medicine and other fields. It

Strontium chloride is an inorganic compound with the chemical formula SrCl2. It is a white crystal, easily soluble in water and ethanol. The main use of Strontium chloride is as a luminescent agent for fireworks and a filament material for lighting equipment. In addition, it is also used as a medicine and chemical reagent. Application of Strontium chloride in fireworks Strontium chloride is a commonly used fireworks luminescent agent. When it's added to the mix in fireworks, it gives off a red glow as it burns. This red glow is so bright that it can be clearly seen in the night sky, so it is widely used in fireworks displays and celebrations. Application of Strontium chloride in lighting equipment Strontium chloride is also used as a filament material for lighting equipment. A filament is a resistive wire used in light bulbs that emits light when electricity passes through it. Strontium chloride's high melting point and good electrical conductivity make it an ideal filament material. In addition, it also has very good corrosion resistance, which can resist high temperature and chemical corrosion. Application of Strontium chloride in the field of medicine Strontium chloride also has certain applications in the field of medicine. It is used as a medicine to treat osteoporosis. Osteoporosis is a common bone disease that causes bones

Nickel Formate is an inorganic compound with the chemical formula Ni(HCOO)2. It is a white powder, easily soluble in water and alcoholic solvents. Nickel Formate has some important applications such as catalysts and electrochemical materials. In this article, we will introduce some properties and applications of Nickel Formate. Properties of Nickel Formate Nickel Formate is a crystalline compound with a monoclinic crystal structure. It has a density of 2.05 g/cm3 and a melting point of 200-210°C. Nickel Formate is stable in air, but decomposes at high temperatures, releasing CO2 and CO. Nickel Formate is chemically stable, but it can be decomposed by acids and alkalis. When it reacts with sodium hydroxide, nickel hydroxide and sodium formate are formed: Ni(HCOO)2 + 2NaOH → Ni(OH)2 + 2NaHCOO Application of Nickel Formate Nickel Formate as a catalyst Nickel Formate can be used as a catalyst in organic synthesis reactions. For example, it can catalyze carbonylation reactions and hydrogenation reactions. In carbonylation reactions, Nickel Formate can convert aldehydes or ketones into anhydrides. In hydrogenation reactions, Nickel Formate can reduce alkenes or aromatic compounds to the correspondin

Barium carbonate (BaCO3) is a colorless, odorless, tasteless white powder and is an important industrial raw material. Barium carbonate has high temperature stability and chemical inertness, and has a wide range of applications, including glass, ceramics, rubber, chemistry, construction and other industries. There are many ways to prepare barium carbonate, the most commonly used methods are sintering and carbonization. The sintering method is obtained by grinding, mixing and sintering barium ore, and the sintering temperature is usually between 1100°C and 1300°C. The barium carbonate prepared by this method has higher purity, but the cost is higher and the technological process is complicated. The carbonization method uses sodium carbonate and barium oxide as raw materials, and reacts at high temperature to obtain barium carbonate. The method has lower cost, but th

Acetate is a versatile and versatile compound with applications across a wide variety of industries. It is a salt formed by combining acetic acid and an organic base and is commonly used in the production of textiles, plastics, and other materials. One of the most common uses is in the production of cellulose acetate, a plastic used in a wide variety of products. Cellulose acetate is made by reacting cellulose fibers with acetic acid and other chemicals, which causes the fibers to dissolve and reform into a plastic material. This process results in a strong, lightweight and flexible material that is often used to produce film, photographic film and eyeglass frames. Acetate is also commonly used in the textile industry to make lightweight, breathable and moisture-wicking fabrics. Acetate fibers are commonly used in the production of clothing and other textiles, and they can be blended with other fibers to create fabrics with specific properties, such as stretch, durability and texture. Besides being used in the production of plastics and textiles, acetates are used in various other industries. For example, it is commonly used as a solvent in the production of pharmaceuticals and other compounds, and as a flavoring agent in the food and beverage industry. It can also have a negative impact on the environment if not managed properly. Acetate products such as plastic films and fabrics can take a long time to decompose in the environment and can contribute to pollution and litter. Furthermore, the production of acetate products can be resource intensive and contribute to greenhouse g

Orthophosphate is often called the active phosphate because it is the only phosphate that reacts directly with the reagents used in the colorimetric assay for the determination of phosphate. This type of phosphate is used by plants, bacteria and algae and is considered a limiting nutrient in surface water bodies such as lakes. Other phosphates are called inactive phosphates. Phosphorus exists almost exclusively in the form of phosphate in water. Phosphate can be dissolved, adsorbed on particulate matter, or present in aquatic organisms. Phosphates may exist in the simplest form of orthophosphate (PO43-), or in higher molecular weight forms such as condensed phosphates and organophosphates. Orthophosphate is often called the active phosphate because it is the only phosphate that reacts directly with the reagents used in the colorimetric assay for the determination of phosphate. This type of phosphate is used by plants, bacteria and algae and is considered a limiting nutrient in surface water bodies such as lakes. Fertilizers contain orthophosphate and may enter water bodies as runoff from agricultural land, making water bodies rich in phosphorus. Determination of active phosphate Measuring principle The active phosphate in water samples was determined by the phosphomolybdenum blue method. Active phosphate can react with ammonium molybdate under certain acidic conditions to produce light yellow ammonium phosphomolybdate, but the color development ability of ammonium phosphomolybdate is weak, and it cannot show yellow under the usual phosphorus concentration. Ammonium phos

Carbonate minerals are compounds of metal cations combined with carbonate radicals. Carbonate minerals are widely distributed, among which calcium-magnesium carbonate minerals are the most developed, forming huge marine sedimentary layers, accounting for 1.7% of the total mass of the crust. Metal cations mainly include sodium, calcium, magnesium, barium, rare earth elements, iron, copper, lead, zinc, manganese, etc., which are combined with anion carbonate to form three types of structures: island, chain and layer. Mainly carbonates with island structure. Carbonate minerals are widely distributed, among which calcium-magnesium carbonate minerals are the most developed, forming huge marine sedimentary layers, accounting for 1.7% of the total mass of the crust. Element Metal cations mainly include sodium, calcium, magnesium, barium, rare earth elements, iron, copper, lead, zinc, manganese, etc., which are combined with anion carbonate to form three types of structures: island, chain and layer. Mainly carbonates with island structure. Shape Carbonate minerals are mostly in columnar, rhombohedral and plate crystal forms. Colorless, white, if it contains transition ions, it will be colored. Mainly glass luster. Generally, the hardness and density are not large, and those in the trigonal crystal system have rhombohedral cleavage. Most carbonate minerals are of exogenous origin, mainly formed by sedimentation. In addition to magmatic carbonatites, most of the endogenous ones are hydrothermal products.

Chlorine exists widely in the human body in the form of sodium chloride. Generally, the human body contains about 75-80 grams of sodium chloride. It mainly exists in tissues and body fluids in the form of chloride ions, which are the most abundant anions in extracellular fluid. It is closely related to the content of bicarbonate. It plays an important role in regulating water, osmotic pressure and acid-base balance in the human body. Chloride ions in the body are often absorbed and metabolized together with sodium ions, and the changes are often consistent. In addition, chloride is also contained in the bones and stomach acid of the human body. The more suitable daily intake of sodium chloride for adults is 2-5 grams. The lack of chlorine in the human body can cause symptoms such as diarrhea and dehydration. Infants who are deficient in chlorine due to hereditary factors can suffer from stunted growth. Some experts believe that excessive sodium chloride intake can lead to high blood pressure. Serum chloride (Cl) normal value: Calculated as chloride: 98~106mmol/L (98~106mEq/L). Calculated by chlorine: 100~106mmol/L (55~376mg/dl). Clinical significance of serum chloride (Cl): (1) Heightening: ① Reduced excretion: acute and chronic renal failure, renal tubular acidosis, obstructive nephropathy, etc. ② Excessive intake: high-salt diet, excessive input of normal saline, especially in chronic renal insufficiency. ③ Respiratory alkalosis. ④ hypertonic dehydration (water loss > sodium loss).

Sodium acetate is an acetate salt derived from glacial acetic acid. Sodium acetate is a chemical that is very easy to make with vinegar and baking soda. When the mixture is cooled below the melting point, it will crystallize. Crystallization is an exothermic process, so these crystals actually generate heat, which is why the substance is often called hot ice. This class of organic compounds has a variety of industrial and everyday primary uses. In food companies, sodium acetate is used as an additive and pickling solution. Because salt acts on food to maintain a special pH value, it can prevent the growth of harmful bacteria. Industrially, sodium acetate trihydrate is prepared by reacting with water as solvent and acetic acid. CH3COOOH+NaOH→CH3COONa+H2O. Sodium acetate can form esters with haloalkanes such as acetane: CH3COONa+BrCH2CH3→CH3OOCH2CH3+NaBr. Sodium acetate is decarboxylated under forced conditions (pyrolysis in the presence) to form (CH4): CH3COONa+NaOH→CH4+Na2CO3. Cesium salt is the catalyst for this reaction. Sodium Acetate As a cleaning solution, Sodium Acetate neutralizes a lot of hydrochloric acid discharged from the factory. It maintains the soft and shiny metal surface by removing rust and dirt. In addition, it can also be found in leather tanning solutions and image solutions. Sodium acetate still plays a certain role in the big health industry. When diluted, it can be used as a solution to replace sodium oxide in IV fluids. Although the risk of using sodium acetate is very small, it is necessary to have relevant knowledge. Sodium acetate must be diluted before it can be added to the intravenous fluid. Therefore, it responds quickly to the hydrolytic acidification pond and can be used as an emergency nitrogen source.

In the field of inorganic chemistry, chloride refers to a salt compound formed by combining negatively charged chloride ions and positively charged cations of other elements. In a broad sense, chloride can also be said to be a combination of chlorine and another element or group. compound. Chloride in the human body Chlorine exists widely in the human body in the form of sodium chloride. Generally, an adult contains about 75-80 grams of sodium chloride, which plays an important role in regulating the water balance mechanism in the human body. In addition, chloride is also contained in the bones and stomach acid of the human body. The more suitable daily intake of sodium chloride for adults is 2-5 grams. The lack of chlorine in the human body can cause symptoms such as diarrhea and dehydration. Infants who are deficient in chlorine due to hereditary factors can suffer from stunted growth. Some experts believe that excessive sodium chloride intake can lead to high blood pressure. Chloride test The formed silver chloride precipitate can be used to test for the presence of chloride ions because silver nitrate encounters chloride ions to produce white silver chloride precipitates that are insoluble in nitric acid. Chemical properties Chlorides are mostly colorless crystals that dissolve in water and form ions, which is why chloride solutions conduct electricity. Chlorides generally have relatively high melting and boiling points.

Oxalate is a salt formed of oxalic acid, containing oxalate ion (C2O42- or (COO)22-). Since oxalic acid is a dibasic acid, oxalate is divided into normal salt oxalate and acid salt hydrogen oxalate, the latter containing HC2O4-. Oxalate can be used as a ligand to form complexes with many metal ions, especially chelates. The ion contains a planar eight-electron π system, and its electronic stability is particularly outstanding. It is a reducing anion that can be oxidized to carbon dioxide by oxidizing agents such as potassium permanganate. Oxalate is poisonous, human swallowing may cause kidney disease or even death, see oxalate poisoning for details. Oxalate ions can precipitate calcium ions to form water-insoluble calcium oxalate. Foods high in oxalate include tomatoes, spinach, strawberries, beets, celery, grapes, green peppers, lamb, potatoes, drupes, beets (carrots), walnuts, chocolate, etc. Soy foods are high in oxalates and phosphates.

Chromate refers to salts containing chromate CrO42−. Generally yellow, silver dichromate is dark red. Chromates of alkali metals and magnesium, such as sodium chromate, potassium chromate, magnesium chromate, etc., are soluble in water, while chromates of other alkaline earth metals and heavy metals are insoluble in water. Has a strong oxidizing effect. When acidified in solution, it is converted into dichromate, and its color changes from yellow to orange-red. Barium chromate and lead chromate are used as yellow pigments. Soluble chromates are commonly used as oxidizing agents and as tanning agents. Can be prepared from chromite ore. Chromate minerals are salts formed by the combination of metal element cations and chromate radicals. Chromium is a variable-valence element that occurs in nature in different valence states and forms different minerals. Because in nature, most of the chromium participates in the composition of oxides and chromium-containing silicates, while the number and types of chromate minerals are very small. There are no more than ten types of data. Chromate minerals are most notably characterized by their distinctive colour. Usually yellow, orange or maroon, green when containing copper. The hardness is generally not high, between 2-3. The specific gravity is generally between 2-3. Chromate minerals are often the product of weathering conditions and are found in the oxidation zones of ore deposits. Effects of occupational exposure to chromate on blood routine indexes. Chromium and its compounds are widely used in chemical industries such as electroplating, welding, alloy manufacturing, pigments, and tanning. Occupational exposure is mainly through respiratory inhalation. Inhalation of dust and smoke containing hexavalent chromium can cause upper respiratory trac

Oxalate has a strong stimulating effect on the mucous membrane, so when a large amount of oxalate is ingested, it can stimulate the mucous membrane of the gastrointestinal tract, thereby causing diarrhea and even gastroenteritis. Oxalate can be degraded by ruminant microorganisms and metabolized to carbonate and bicarbonate. Therefore, ruminants are more tolerant to oxalate than non-ruminants. Ruminants only cause poisoning when a large amount of oxalate is ingested in a short period of time (such as starvation), because part of the oxalate cannot be converted into the abomasum and absorbed by the animal. Oxalate can also crystallize in blood vessels and penetrate the vessel wall, causing vascular necrosis, leading to hemorrhage. Oxalate crystals can also sometimes form in brain tissue, causing central nervous system dysfunction. Oxalates are salts formed from oxalic acid and contain the oxalate ion (C2O42- or (COO)22-). Since oxalic acid is a dibasic acid, oxalate is divided into two types: normal salt oxalate and acid salt hydrogen oxalate, the latter containing HC2O4-. Oxalate Oxalate can be used as a ligand to form complexes with many metal ions, especially chelates. In this ion, there is a planar eight-electron π system, and the electronic stability is particularly outstanding. It is a reducing anion and can be oxidized to carbon dioxide by oxidants such as potassium permanganate. Oxalate is toxic and can cause kidney disease and even death if swallowed. See Oxalate Poisoning for details. Oxalate ions can precipitate calcium ions, resulting in water-insoluble calcium oxalate. Foods high in oxalate include tomatoes, spinach, strawberries, beets, celery, grapes, green

"Phosphate" is the general name of "phosphorus oxo acid salt". Phosphate can be divided into simple phosphate and complex phosphate. Simple phosphate is a variety of salts that correct phosphoric acid. For example, M3PO4M2HPO4 and MH2PO4M are one-plus metal ions. Such as potassium dihydrogen phosphate Phosphate is one of the natural ingredients of all foods; phosphate is a compound with multivalent anions, at lower concentrations, higher ionic strength Phosphate additives can improve the taste and novelty of food However, excessive intake of phosphorus by the human body will make the calcium in the body unable to be absorbed enough for use, which may easily cause fractures, tooth loss and bone deformation. Orthophosphate is MPO4. Remember to match the valence and it is easy to be hydrolyzed. If you know the amount of orthophosphate that you just put in first, it is related to the content. If you only know the content in the solution, you can calculate it. PO4 3 is very little; phosphate is not - nitrate salt, nitrite, mainly refers to sodium nitrite, sodium nitrite is white to light yellow powder or granular, slightly salty taste, soluble in water Phosphate is all food One of the natural ingredients, as the main food ingredient and efficacy enhancer is commonly used in food processing while sodium nitrite is harmful to the human body. A chemical fertilizer industry - Phosphate is usually used in detergents as water softeners, but because the algae bloom cycle will affect the discharge of phosphates in the watershed, so in some areas phosphate detergents are restricted In agriculture, phosphate is one of the three main nutrients for flowers and trees, and is the main component of fertilizers; phosphate is a compound with multivalent anions, and at lower concentrations, it has higher ionic strength phosphate Additives can improve the ta

Iodide refers to compounds containing iodine, including metal iodides and non-metal iodides. Active metal iodides are ionic compounds, other metal compounds and non-metallic compounds are covalent compounds. Most iodides are soluble in water, but silver iodide, mercurous iodide, mercuric iodide, cuprous iodide, and lead iodide are insoluble. Organic iodides are generally more reactive than the corresponding chlorides or bromides. Alkyl iodides can be used in alkylation reactions. Organic iodine compounds are commonly used as drugs in medicine, and radioactive iodides are also used for radiodiagnosis and treatment. In acidic solution, iodide is easily oxidized to elemental iodine molecule by oxygen in the air. In alkaline solution, iodide is not easily oxidized. nature The stability of iodide is generally smaller than that of other halides, and iodide ion has a strong reducibility. Compared with other halide ions, iodide ions are more likely to form polyiodides and coordination compounds. Most iodides are soluble in water. Metal chlorides are sparingly soluble in water, and their iodides are also poorly soluble in water. An aqueous solution of hydrogen iodide, called hydriodic acid, is a strong acid. Alkali metal iodides can be obtained from their carbonates and hydroiodic acid or ferrous iodide. Inorganic iodides are similar to chlorides and can also be divided into three categories: covalent, ionic and complex. Among halides, iodide has strong covalentity and is the strongest reducing agent in halide ions. Nonmetal iodides generally have lower melting and boiling points. The iodide of the element with significant metallicity is easily soluble in water, and its solubility is slightly smaller than that of chloride. Bismuth iodide and mercury iodide are slightly soluble in wat

Carbonate can be divided into three types: normal salt M2CO3, acid salt MHCO3 and basic carbonate M2(OH)2CO3 (M is metal). The carbonate minerals that exist in nature include calcite, aragonite (aragonite), magnesite, dolomite, siderite, rhodochrosite, smithsonite, white lead ore, strontium carbonate and witherite. Carbonates and acid carbonates (also known as bicarbonates) are mostly colorless. Carbonates of alkali metals and ammonium are easily soluble in water, while carbonates of other metals are insoluble in water. Sodium bicarbonate is less soluble in water, and other acid carbonates are easily soluble in water. Metal ion carbonates containing hydroxide groups are called basic salts and are double salts. The important ones are basic copper carbonate [CuCO3·Cu(OH)2], basic lead carbonate [2PbCO3·Pb(OH)2], etc. and the naturally occurring azurite [Cu3(CO3)2(OH)2], Malachite [Cu2 (OH) 2CO3] and so on. Calibration method When titrating a water sample with a standard hydrochloric acid solution, if phenolphthalein is used as an indicator, when the titration reaches the equivalence point, the pH is 8.4, and the amount of acid consumed at this time is only half of the carbonate content. base orange indicator, when continuing to titrate to the equivalence point, the pH value of the solution is 4.4, and what is titrated at this time is the bicarbonate converted by carbonate and the original bicarbonate in the water sample. The sum, according to the volume of the standard solution of hydrochloric acid consumed at the two end points indicated by phenolphthalein and methyl orange, can calculate the content of carbonate and bicarbonate respectively. Zinc carbonate Chemical formula: ZnCO3 Appearance: white powde

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). Sodium Bromide Sodium Bromide is white crystal or powder. Salty or slightly bitter. Absorbs moisture from the air and clumps without deliquescence. Dissolved in water. Low toxicity, irritating. Used for trace determination of cadmium in analytical chemistry, photoengraving, and pharmaceuticals. Physical and chemical properties Colorless cubic crystal or white granular powder. Odorless, alkaline and slightly bitter. Relative density 3.203 (25 ℃). Melting point 747 ℃. Hygroscopic in air. It is easily soluble in water (the solubility is 121g/100ml water at 100℃), and the aqueous solution is neutral. Slightly soluble in alcohol. Anhydrous sodium bromide crystals are precipitated in the solution at 51°C, and dihydrate is formed below 51°C. Its bromide ion can be replaced by chlorine. Potassium Bromide

Strontium fluoride properties: 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. Soluble in hydrochloric acid, insoluble in hydrofluoric acid, ethanol and acetone. The product belongs to cubic crystal system, which is stable in air and can be decomposed by strong acid. 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. 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 role of ferrous phosphate in medicine is mainly to treat anemia caused by iron deficiency in the body, such as iron deficiency anemia. Iron ion is an important raw material for the synthesis of heme, and the combination of heme and globin can form hemoglobin, which is an important component of blood and participates in the transport of oxygen. Adolescents have a partial eclipse, lack of intake of green leafy vegetables, or menorrhagia in women, which lead to depletion of iron stores in the body, resulting in iron deficiency in red blood cells, insufficient hemoglobin synthesis, and iron deficiency anemia. Patients are usually accompanied by symptoms such as dizziness, headache, and vertigo. Iron deficiency in tissues may also cause dry hair, inability to concentrate, and slower growth and development in children. Generally, it can be corrected by exogenous iron supplementation. As an iron supplement, ferrous phosphate can play a therapeutic role and effectively improve the symptoms of patients. Patients should note that ferrous phosphate has a certain stimulating effect on the stomach, and patients may experience adverse reactions such as nausea and vomiting after taking it, so it is generally recommended to take it after meals. In addition, when taking ferrous phosphate, vitamin C can be appropriately supplemented according to the doctor's advice to promote iron absorption, but it should be avoided to take it with milk and tea, so as not to affect the absorption of iron. 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.