Antimony sulfide

Antimony sulfide
Chemical formula: Sb2S3
International name: Antimony trisulfide
CAS No: 1345-04-6
Qualification: Import Technical
Appearance: black powder
Packing: bags, 25 kg
Storage conditions: in a dry, well-ventilated area
Synonyms: 3 antimony sulfide, antimony trisulfide, antimony

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The antimony content of 65% min.
Sulfur content 24% min
Moisture content of 1.0%
Relative density ~4.6 g / cm3
Bulk density 1.0-1.3 g / cm3
Sieve residue 45 µm %1.0 max

3 antimony sulfide, antimony trisulfide, antimony.

Molecular weight 339.7. Dark grey crystalline substance with metallic luster. Amorphous modification has an orange color.
In water and organic solvents not dissolves. Dissolves in alkali metal sulfides, concentrated hydrochloric acid and alkalis. Decomposed by hot water with liberation of toxic products, therefore, the wet compositions with trisulfide of antimony cannot be dried at elevated temperature.
T of melting 548°C. when heated in air above 176°C slowly begins to turn into antimony oxide. At temperatures above 380°C becomes noticeably volatile and can be distilled almost without decomposition.
Density 4,635 g / cm3. Heat of formation -182.1 kJ / mol. Melting heat 233 kJ / kg. heat Capacity at 300K 347 j/(kg·K), thermal conductivity 0.59 W / (m·K).
With chlorates and perchlorates forms a mixture very sensitive to mechanical stress.
Toxic. Irritate the skin. When burned, it forms a poisonous antimony oxide. MPC 1мг/м3.

The main use of antimony sulfide is the production of friction materials, such as brake pads.
Also used to produce semiconductor materials.
Antimony sulfide in pyrotechnics is used primarily in glitters, as well as grater, percussion, low-gas, and in some spark-forming white-fire compositions as fuel. Flame gives a pale green tint.