What Is Antimony Oxide?
Antimony oxide is the generic name for antimony oxides: antimony oxide (III), antimony oxide (IV), and antimony oxide (V).
Antimony oxide (III), also called antimony trioxide or diantimony trioxide, has the composition Sb2O3 (CAS No.: 1309-64-4).
Antimony oxide (V), also known as antimony pentoxide, antimony pentoxide, antimononic anhydride, and antimony dioxide, is a compound with the composition Sb2O5 (CAS No.: 1314-60-9). Antimony oxide (Ⅲ) is usually the most commonly used and widely sold as a product.
Uses of Antimony Oxide
Antimony oxide (III) is the most widely used of all antimony oxides. Antimony oxide (III) is used as a flame retardant in synthetic resins, rubber, and fibers.
It is also used as a clarifying agent for glass because its transparency is improved by adding it to glass. Elsewhere, antimony oxide (III) is used as a white pigment and polymerization catalyst.
Properties of Antimony Oxide
1. Basic Information on Antimony Oxide (III) Sb2O3
Antimony oxide (III) has a molecular weight of 291.497, a melting point of 655°C, and a boiling point of 1,425°C. It is a white solid in appearance at room temperature.
2. Basic Information on Antimony Oxide (IV) Sb2O4
Antimony oxide (IV), with a molecular weight of 307.50, is a colorless crystal at room temperature, and decomposes at temperatures above 930°C, releasing oxygen to form antimony oxide (III) Sb2O3.
3. Basic Information on Antimony Oxide (V) Sb2O5
Antimony oxide (V) has a molecular weight of 647.03 and is a yellowish-white solid at room temperature. Its density is 3.78 g/mL.