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Polyester Catalyst Grade Antimony trioxide(ATO)(Sb2O3) powder Minimum Pure 99.9%

Short Description:

Antimony(III) Oxide is the inorganic compound with the formula Sb2O3. Antimony Trioxide is an industrial chemical and also occurs naturally in the environment. It is the most important commercial compound of antimony. It is found in nature as the minerals valentinite and senarmontite. Antimony Trioxide is a chemical used in the manufacture of some polyethylene terephthalate (PET) plastic, which is used to make food and beverage containers. Antimony Trioxide is also added to some flame retardants to make them more effective in consumer products, including upholstered furniture, textiles, carpeting, plastics, and children’s products.


Product Detail

Antimony Trioxide Properties

Synonyms Antimony Sesquioxide, Antimony Oxide, Flowers of Antimony
Cas No. 1309-64-4
Chemical formula Sb2O3
Molar mass 291.518g/mol
Appearance white solid
Odor odorless
Density 5.2g/cm3,α-form5.67g/cm3β-form
Melting point 656°C(1,213°F;929K)
Boiling point 1,425°C(2,597°F;1,698K)(sublimes)
Solubility in water 370±37µg/L between20.8°C and 22.9°C
Solubility soluble in acid
Magnetic susceptibility(χ) -69.4·10−6cm3/mol
Refractive index(nD) 2.087,α-form,2.35,β-form

Grade & Specifications of Antimony Trioxide:

Grade Sb2O3  99.9% Sb2O 99.8% Sb2O3  99.5%
Chemical Sb2O% min 99.9 99.8 99.5
AS2O% max 0.03 0.05 0.06
PbO % max 0.05 0.08 0.1
Fe2O% max 0.002 0.005 0.006
CuO % max 0.002 0.002 0.006
Se % max 0.002 0.004 0.005
Physical Whiteness (min) 96 96 95
Particle size (μm) 0.3-0.7 0.3-0.9 0.9-1.6
- 0.9-1.6 -

 Package: Packed in 20/25kgs Kraft paper bags with the inner of PE bag, 1000kgs on wooden pallet with plastic-film protection. Packed in 500/1000kgs net plastic super sack on wooden pallet with plastic-film protection. Or according to buyer's requirements.

 

What is Antimony Trioxide used for?

Antimony Trioxide is primarily used in combination with other compounds to provide flame retardant properties. The main application is as flame retardant synergist in combination with halogenated materials. The combination of the halides and the antimony is key to the flame-retardant action for polymers, helping to form less flammable chars. Such flame retardants are found in electrical apparatuses, textiles, leather, and coatings. Antimony(III) Oxide is also an opacifying agent for glasses, ceramics and enamels. It is a useful catalyst in the production of polyethylene terephthalate (PET plastic) and the vulcanization of rubber.


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