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Antimony Trisulfide

Antimony Trisulfide (Sb2S3) Powder 1345-04-6

Antimony Trisulfide is a black powder, which is a fuel used in various white star compositions of the potassium perchlorate-base. It is sometimes used in glitter compositions, fountain compositions and flash powder.

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Antimony Trisulfide

Molecular formula: Sb2S3
CAS No. 1345-04-6
H .S code: 2830.9020
Molecular Weight: 339.68
Melting Point: 550 Centigrade
Boiling Point: 1080-1090Centigrade.
Density: 4.64g/cm3.
Vapor pressure: 156Pa（500℃）
Volatility: None
Relative weight: 4.6（13℃）
Solubility (water): 1.75mg/L(18℃)
Others: soluble in acid hydrochloride
Appearance: black powder or silver black little blocks.

 

About Antimony Trisulfide

Tint: According to its different particle sizes, manufacturing methods and production conditions, the formless antimony trisulfide is provided with different colors, such as gray, black, red, yellow, brown and purple, etc..

Fire Point: Antimony trisulfide is easy to be oxidized. Its fire point - the temperature when it begins self-heat and oxidation in the air depends on its particle size. When the particle size is 0.1mm, the fire point is 290 Centigrade; when the particle size is 0.2mm, the fire point is 340 Centigrade.

Solubility: Insoluble in water but soluble in hydrochloric acid. In addition, it can also dissolve in the hot concentrated sulfuric acid.

Appearance: There should not be any impurity that can be differentiated by eyes.

 

Enterprise Standard of Antimony Trisulfide Specification

Symbol Application Content Min. Element Controlled (%) Moisture Free Sulphur Fineness (mesh)
(%) Sb> S> As< Pb< Se< Max. Max. >98%
UMATF95 Friction Materials 95 69 26 0.2 0.2 0.04 1% 0.07% 180(80µm)
UMATF90 90 64 25 0.3 0.2 0.04 1% 0.07% 180(80µm)
UMATGR85 Glass&Rubber 85 61 23 0.3 0.4 0.04 1% 0.08% 180(80µm)
UMATM70 Matches 70 50 20 0.3 0.4 0.04 1% 0.10% 180(80µm)

Packaging status: petroleum barrel (25kg), paper box (20、25kg),or as customer’s requirement.

 

What is Antimony Trisulfide used for?

Antimony Trisulfide(Sulfide) is widely used in the war industry including gunpowder, glass and rubber, match phosphorus, fireworks, toy dynamite, simulated cannonball and friction materials and so on as the additive or catalyst, anti-blushing agent and heat-stabilizer and also as the flame-retardant synergist replacing antimony oxide.

 
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