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Antimony Trioxide (China Origin)

Antimony Trioxide (China Origin)
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Country Origin : China Appearence : Solid Crystalline Powder
CAS No. : 1309-64-4 H.S. Code : 2825.80.00
Formula : Sb2O3 Common Names : Antimonous oxide
IUPAC Name : Antimony(III) oxide
Packaging : 1000 @ 25 kg PP/PE bags, 25 MT / 20'FCL
  • Description
  • Application
Brief Overview

 

Antimony is a metal that occurs naturally in the earth’s crust. The most important commercial compound derived from antimony is Antimony Trioxide commonly known as ATO and has chemical formula Sb2O3. Antimony Trioxide is a white, odorless crystalline (sand-like) powder. ATO is an amphoteric oxide, which can dissolve both in Ukraine and acidic solutions. ATO gives antimonites when dissolved in alkaline solution and gives polyantimonous acids when dissolved in acid solution. ATO can easily be oxidized or reduced; it can be oxidized to antimony pentoxide and various other antimony compounds. ATO is toxic, it is presumed to have carcinogenic potential for humans.

 

ATO is used in a wide variety of industrial applications, mainly as a synergist with flame retardant chemicals and as a catalyst in the manufacture of polyester (PET). The structure of ATO structure alters with the change of the sample temperature. These orthorhombic structures are very stable, existing in nature as mineral valentine.

 

Manufacturing Process

 

Antimony oxide can be prepared by two processes, the direct and the indirect process.

 

Indirect process

In this process, antimony metal or ores is melted in a furnace to give ATO vapors. The vapors are quenched with air and cooled to convert the vapor to white powder .These powders are further filtered to give antimony trioxide powder.

http://intern.tradeasia.us/admin/photogallery/1321969240Indirect%20Process%20Image%20antimony%20trioxide.jpg

 

Direct process

In this process crude antimony oxide is roasted in the presence of air to give ATO vapors. The vapors are then condensed to convert the vapor to white powder. These powders are further filtered to give antimony trioxide powder.

http://intern.tradeasia.us/admin/photogallery/1206157164direct%20Process%20Image%20antimony%20Trioxide.jpg




Fire retardant synergist

Fire safety is very necessary both at home and at public places so fire flammable materials should be made fire safe to a high degree so we use flame retardant chemicals. ATO enhances the effectiveness of flame retardants, when used as a synergist in combination with halogenated flame retardants in plastics, rubber, adhesives and textile back coatings.

ATO is used in many appliances such as TVs, computers, industrial electrical, circuit boards, switches, etc. Integrated into upholstered furniture and decorative foams, ATO is applied in clothing like hospital linen children’s nightwear. In transport vehicles, it plays a significant role as a flame retardant in seats, cables and plastic structures to help strive more time for escaping in case of fire.

 

Paint Industry

ATO enhances the effectiveness of flame retardants, when used as a synergist in combination with halogenated flame retardants in paint industry.

 

PET

ATO is the major catalyst for production of PET bottles, which is the best material for plastic bottles. Detectable amount of antimony can be found and removed by washing on the surface of PET bottles. ATO could migrate into food and drinks with less toxic if the foods and beverages are consumed under normal condition.

 

Other Applications

ATO is used as a clarifying aid in certain glasses, and as additive in semi-conductors. It is used even as a coating on certain grades of titanium dioxide pigments. ATO is employed in manufacturing of complex inorganic colored rutile pigments as an essential component. In addition, it functions as the pacifier in iron bath and sinking enamel.