Bismuth Sulfide CAS 1345-07-9 is a dark gray to black-brown powder used as a solid lubricant and friction modifier in brake pads, brake linings and clutch materials.

Bismuth Sulfide can be used alone or blended with graphite, molybdenum disulfide, tin sulfides and iron sulfides.

Structural formula: 

Product Specification

Bismuth Sulfide Applications

Brake and Clutch Friction Materials

Bismuth Sulfide is added to disc brake pads, drum brake linings, brake shoes and clutch linings as a solid lubricant and friction modifier. Bismuth Sulfide can also be combined with MoS₂, SnS, SnS₂, FeS, graphite and other friction additives.

Industrial Lubricants and Self-Lubricating Materials

Bismuth Sulfide is used in heavy-duty lubricating grease for open gears, pinions and mining machinery. It provides solid lubrication when equipment operates under high load and slow movement.

Semiconductor and Advanced Material Production

High-purity Bismuth Sulfide is used as a source material for preparing Bi₂S₃ thin films, nanosheets, nanorods and composite materials.

Its light absorption and semiconductor properties make it useful for photodetectors, photosensitive materials, solar-cell research, infrared devices and thermoelectric studies.

Bismuth Compound Synthesis

Bismuth Sulfide can be used as a starting material for preparing other bismuth compounds and specialty inorganic materials.

Packaging and Storage

This product is packed in 25kg bag, and it can also be customized according to customers’ requirements

Store Bismuth Sulfide in a dry, cool and well-ventilated place. Keep the container tightly closed and protect the powder from moisture and outside contamination. Keep it away from strong acids and strong oxidizing agents.