Antimony-based flame retardants are one of the most important inorganic flame retardants, significantly enhancing the effectiveness of halogen-based flame retardants. The main varieties of antimony-based flame retardants are antimony trioxide (ATO), colloidal antimony pentoxide, and sodium antimonate. Among them, ATO is the most important, serving as an indispensable synergist in nearly all halogen-based flame retardants.<\/p>\n
1. Performance<\/strong><\/p>\n The molecular formula of antimony trioxide is Sb2O3, with a relative molecular mass of 91.60 and a theoretical antimony content of 83.54%. Sb2O3 is a white cubic crystal with a density of 5.2 g\/cm\u00b3 and a refractive index of 2.087. The melting point of Sb2O3 is 656\u00b0C, with a heat of fusion of 54.4\u201355.3 kJ\/mol, a heat of vaporization of 36.3\u201337.2 kJ\/mol, and a standard enthalpy of formation of \u2013692.5 kJ\/mol. It is insoluble in water and ethanol, but soluble in hydrochloric acid, concentrated sulfuric acid, concentrated alkalis, oxalic acid, and tartaric acid.<\/p>\n 2. Quality Indicators<\/strong> 3. Properties<\/strong><\/p>\n Antimony trioxide is a white, odorless crystalline powder. It is an amphoteric oxide with better weather resistance than lithopone, low chalking, heat resistance, turns yellow when heated, and returns to white upon cooling.<\/p>\n 4. Solubility<\/strong><\/p>\n Antimony trioxide is insoluble in water and ethanol, but soluble in concentrated hydrochloric acid, concentrated sulfuric acid, concentrated alkali, oxalic acid, and tartaric acid.<\/p>\n 5. Uses<\/strong><\/p>\n Antimony trioxide is used in the manufacture of enamel, pigments, tartar emetic, and pharmaceuticals, and as a filler and mordant. It is mainly used in the production of fire-resistant paint. At high temperatures, antimony white can react with chlorine-containing resins to form antimony chloride, which can prevent the spread of flames and achieve fire resistance. It is often used as a synergist for brominated flame retardants together with zinc oxide, sodium hydroxide, etc., in plastic fire-resistant systems.<\/p>","protected":false},"excerpt":{"rendered":" Antimony-based flame retardants are one of the most important inorganic flame retardants, significantly enhancing the effectiveness of halogen-based flame retardants. The main varieties of antimony-based flame retardants are antimony trioxide (ATO), colloidal antimony pentoxide, and sodium antimonate. Among them, ATO is the most important, serving as an indispensable synergist in nearly all halogen-based flame retardants.<\/p>","protected":false},"featured_media":605,"template":"","meta":[],"product_brand":[],"product_cat":[54,17],"product_tag":[],"class_list":["post-604","product","type-product","status-publish","has-post-thumbnail","product_cat-antimony-trioxide","product_cat-antimony-trioxide-replacement","first","instock","shipping-taxable","product-type-simple"],"yoast_head":"\n
\nAntimony trioxide: Sb2O3 \u2265 99.81%
\nLead oxide PbO: \u2264 0.05%
\nCopper oxide CuO: 0.0004%
\nIron oxide Fe2O3: 0.0025%
\nTartaric acid insoluble matter TAL: 0.025%
\nWhiteness: 95%
\nParticle size: 0.5 \u03bcm\u20131 \u03bcm<\/p>\n