Antimony trisulfide

Antimony trisulfide (CAS 1345-04-6), also sold as antimonous sulfide or black antimony, is an inorganic sulfide compound used primarily as a flame retardant and pigment.

Where is Antimony trisulfide used?

• Rubber and tire manufacturing: flame retardant additive and vulcanization modifier improving heat resistance
• Pyrotechnics and matches: fuel component and friction-sensitive oxidizer contributor in strike surfaces and delay compositions
• Specialty pigments: dark coloration in printing inks and industrial coatings
• Mining and metallurgy: precursor in antimony refining and recovery
• In combustion management and coloration it is a recurring specification in specialty coatings.

Commercial specifications

• Particle size and purity specifications vary by end-use grade
• Purity levels range from 95% to 99%+
• Moisture content and heavy metal impurity limits specified