antimonous oxide
Characters
White crystalline powder. Heating turn yellow, cold white. Odorless. When heated to 400 ° C in high vacuum can be sublimated. Soluble in sodium hydroxide solution, heat tartaric acid solution, hydrogen tartrate salt solution and sodium sulfide solution, slightly soluble in water, dilute nitric acid and dilute sulfuric acid. The relative density of 5.67. The melting point of 655 ℃. The boiling point of 1425 ℃. Median lethal dose (rat, oral)> 20G/kG. Carcinogenic potential.
Store
Seal dry saved.
Use
Catalyst, mordant, fabric, paper, plastics, flame retardants, glass decolorizing agent. For the preparation of antimony potassium tartrate, glaze, and fire retardant. Manufacturing lead softener.
antimonous oxide is the first application of flame retardant in epoxy resin, polyurethane, chloroprene rubber, polystyrene, polyvinyl chloride, polyester, when used alone, the dosage should be flame-retardant effect (unless halogen-containing flame retardants), and halogen compounds (R.HX) and there are good synergies, the flame retardant effect is significantly improved.
Response to release of H2O and generate low melting point, be able to gasification halogenated antimony, and the dilution of flammable gases. His relative density isolated from the air, covering the surface of polymer materials, and promote the carbonization reaction, reducing the temperature of the combustion system can capture the combustion process gas free of HO and of H., thereby inhibiting combustion. Fact antimony trioxide is commonly used flame retardant synergist with halogen compounds than the 3-1 best.
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