Stannous chloride dihydrate

Stannous chloride dihydrate

Other name: stannic chloride dihydrate
CAS no. : 10025-69-1
EINECS no. : 231-868-0
Molecular formula: H4ClO2Sn
Molecular weight: 190.1919
Melting point: 37-38 ℃
Water soluble: 1187 g/L (20℃)

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Purity: 99%
Properties: colorless monoclinic prism crystal. Crystals or solutions can absorb oxygen from the air and become insoluble oxychlorides. Decomposition at high heat. Easily soluble in dilute or concentrated hydrochloric acid, soluble in less than its weight of water, when dissolved in a lot of water, the formation of insoluble basic salt, soluble in ethanol, ethyl acetate, glacial acetic acid and sodium hydroxide solution. Adding trace amount of metallic tin can prevent oxidation of solution. Relative density

Application: used in dye, perfume, mirror making, electroplating and other industries; And used as ultra-high pressure lubricating oil, bleach toxicity protection: in the production process of making tin flowers should be prevented from inhaling tin dust, so as not to cause chronic bronchitis, tin chloride solution and skin contact can cause eczema. The maximum permissible concentration of tin in the United States is 2mg/m3 for inorganic compounds (in metallic tin). Production personnel should wear work clothes, wear gas masks and gloves and other labor protection products, pay attention to protect respiratory organs, protect the skin, production equipment should be closed, the workshop ventilation is good. Packing storage and transportation: packed in iron or wooden or plastic drums lined with plastic bags, each net weight of 25kg, 30kg or 50kg, marked “sealed” on the package. Should be stored in a cool, ventilated, dry warehouse, storage temperature should not be higher than 32℃. Containers must be sealed and protected from moisture. Do not store and transport with oxidant. Transportation should be rain – proof and sun – proof. Handle with care during handling to prevent packing damage. Fire, water, sand and all kinds of fire extinguishers to put out. Physicochemical properties: colorless or white oblique crystal system. Relative density 2.710. The melting temperature of 37.7 ℃. It decomposing into hydrochloric acid and base salts at the melting point. Gradually oxidized to insoluble chlorine oxides in air. Soluble in alcohol, ether, acetone, glacial acetic acid, in concentrated hydrochloric acid solubility greatly increased. Water dissolves. Neutral aqueous solution is easy to decompose and generate precipitation. Acidic solution has strong reducibility and can reduce chromium oxide (hexavalent) to Cr3+,Cu2+ to Cu+,Hg2+ to Hg+ and Hg, Ag+ to Ag, and Fe3+ to F2+. Can reduce nitrocompounds to amines. React with alkali to form water and oxide precipitation, but in excess of alkali, the formation of soluble stannous salt.

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