Product Name: Antimony Trioxide

Product Description: Antimony flame retardants are one of the most important inorganic flame retardants, which can greatly improve the efficiency of halogen flame retardants. The main varieties of antimony flame retardants are antimony trioxide (ATO), colloidal antimony pentoxide and sodium antimonate. One of the most important is ATO, which is an indispensable synergist for almost all halogenated flame retardants. Product details:

Antimony flame retardants are one of the most important inorganic flame retardants, which can greatly improve the efficiency of halogen flame retardants. The main varieties of antimony flame retardants are antimony trioxide (ATO), colloidal antimony pentoxide and sodium antimonate. One of the most important is ATO, which is an indispensable synergist for almost all halogenated flame retardants.

1. Performance

The molecular formula of antimony trioxide is Sb2O3, the relative molecular mass is 91.60, and the theoretical antimony content is 83.54%. Sb2O3 is a white cubic crystal with a density of 5.2g/cm3 and a refractive index of 2.087. The melting point of Sb2O3 is 6560C, the heat of fusion is 54.4-55.3kj/mol, the heat of evaporation is 36.3-37.2kj/mol, and the standard enthalpy of formation is -692.5kj/mol. Insoluble in water and ethanol, soluble in hydrochloric acid, concentrated sulfuric acid, concentrated alkali, oxalic acid, tartaric acid and fuming nitric acid.

2. Quality indicators

Antimony trioxide: Sb2O3 ≥99.8%

Lead oxide PbO:≤0.05%

CuO: 0.0004

Iron oxide Fe2O3: 0.0025

Tartaric acid insoluble matter TAL: 0.025

Whiteness: 95

Particle size: 0.5μm—1μm

3. Characters

Antimony trioxide is a white odorless crystalline powder. It is an amphoteric oxide with better weather resistance than lithopone.

4. Dissolution

Antimony trioxide is insoluble in water and ethanol, soluble in concentrated hydrochloric acid, concentrated sulfuric acid, concentrated alkali, oxalic acid, tartaric acid and fuming nitric acid.

5. Purpose

Antimony trioxide is used to make enamel, pigment, tartar, medicine, and as filler, mordant, etc. Mainly used in the manufacture of fire retardant paint, antimony white can react with chlorine-containing resin at high temperature to generate antimony chloride, which can prevent the spread of fire and achieve the effect of fire prevention. Changhe zinc oxide, sodium hydroxide, etc. are used as synergists of brominated flame retardants in plastic fire protection systems.