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Sodium chloride

Sodium chloride

Colorless cubic crystals or white crystals are the main components of table salt. Easy to dissolve in water and glycerol, slightly soluble in ethanol and liquid ammonia, insoluble in hydrochloric acid, and slightly deliquescent in air. Mainly used in the production of industrial raw materials such as chlorine gas, hydrogen gas, bleach powder, and sodium metal, as well as for supplying salt precipitation soap, tanning leather, food seasoning, and pickled fish, meat, and vegetables. If consumed excessively, it can easily lead to hypertension.

Anhydrous calcium chloride

Anhydrous calcium chloride

Highly hygroscopic, it is a widely used desiccant, mainly used as a desiccant for gases, petroleum, organic solvents (such as alcohols, ethers, etc.), and as a preservative for items. It is a widely used chemical reagent, pharmaceutical raw material, food additive, feed additive, and raw material for manufacturing metallic calcium.

Sodium thiosulfate

Sodium thiosulfate

Sodium thiosulfate, also known as baking soda or seaweed. It is a white crystalline powder of monoclinic crystal system, easily soluble in water and insoluble in alcohol. Used for analyzing reagents, etc., with a wide range of applications. Chemical formula: Na2S2O3, specific gravity 1.667, is oxidized and decomposed into sodium sulfate and sulfur dioxide when heated in air. Specific gravity 1.667, easily decomposed upon heating, into sodium sulfate and sulfur or sodium sulfate and sodium polysulfide, while being oxidized by oxygen. Sodium thiosulfate decomposes with acid, releasing sulfur dioxide gas and producing sulfur precipitation. Heating in air oxidizes and decomposes into sodium sulfate

Insurance powder

Insurance powder

Sodium hydrosulfite, also known as sodium hydrosulfite, is a white sandy crystalline or pale yellow powder chemical product with a melting point of 300 ℃ (decomposition) and an ignition temperature of 250 ℃. It is insoluble in ethanol and soluble in sodium hydroxide solution. It reacts strongly with water and burns.

Phosphorus pentoxide

Phosphorus pentoxide

Produced by the combustion of phosphorus in oxygen, with the chemical formula P2O5. White amorphous powder or hexagonal crystal. Highly hygroscopic. Sublimation at 300 ℃. Not burning. Dissolving in water generates a large amount of heat and produces phosphoric acid, which reacts with ethanol similarly to water. The relative density is 2.30. Melting point 340 ℃. Acidic oxides are corrosive and should not be touched or consumed directly by hand, nor smelled directly.

Sodium hexametaphosphate

Sodium hexametaphosphate

It refers to the hexamer (NaPO3) 6. Sodium hexametaphosphate is a mixture of various polyphosphates, namely sodium polyphosphate, and hexamer is one of them. Formerly known as' Graham 'salt. Discovered by Graham in 1832. He heated the salt obtained by dehydrating sodium dihydrogen phosphate at its melting point (625 ℃) and rapidly cooled the melt to produce hygroscopic Graham salt.

Polyformaldehyde

Polyformaldehyde

Linear polymer of formaldehyde. Without a fixed melting point, it decomposes upon heating. Melting point of 120-170 ℃. Easy to dissolve in hot water and release formaldehyde, slowly soluble in cold water, soluble in caustic soda and alkali metal carbonate solutions, insoluble in alcohols and ethers, and highly polymer insoluble in water.

Potassium hydroxide

Potassium hydroxide

Potassium hydroxide (chemical formula: KOH, formula: 56.1) is a white powder or flaky solid. Melting point 380 ℃, boiling point 1324 ℃, relative density 2.04g/cm3, refractive index n20/D1.421, vapor pressure 1mmHg (719 ℃). Its properties are similar to caustic soda, with strong alkalinity and corrosiveness. The pH of a 0.1mol/L solution is 13.5. Highly susceptible to absorbing moisture from the air and deliquescence, absorbing carbon dioxide to form potassium carbonate. Dissolve in approximately 0.6 parts hot water, 0.9 parts cold water, 3 parts ethanol, 2.5 parts glycerol, and slightly soluble in ether. When dissolved in water, alcohol, or treated with acid, a large amount of heat is generated. Moderate toxicity, LD50 (rat, oral) 1230mg/kg.

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