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    Related: Lubricant Additive Boron Nitride Lithium Stearate
    • Molybdenum Disulfide CAS 1317-33-5

    Molybdenum Disulfide CAS 1317-33-5

    Molybdenum Disulfide, CAS 1317-33-5, is a layered solid lubricant and extreme-pressure additive supplied for greases, friction materials, engineering plastics, dry-film coatings, carbon brushes and powder metallurgy. Confirm the required purity, particle size and grade, then request a quotation with COA/TDS/SDS for bulk supply.

    • CAS: 1317-33-5
    • Synonyms: Molybdenum(IV) sulfide, Moly sulfide, Molybdenum sulphide, MoS2 powder
    • Einecs: 215-263-9
    • Molecular Formula: MoS₂
    • Grade: Technical Fine Grade / Superfine Grade / Grease Grade
    • Package: 25kg Fiber Drum or Multi-wall Paper Bag (with PE liner)
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    Product Description

    Molybdenum Disulfide, CAS 1317-33-5, also called molybdenum(IV) sulfide or MoS2, is a dark-gray to black solid lubricant powder.

    Synonyms: Molybdenum(IV) sulfide; Moly sulfide; Molybdenum sulphide; MoS2 powder.

    CAS: 1317-33-5.

    It has a molecular weight of about 160.07 g/mol and a layered hexagonal structure with weak van der Waals forces between sulfur layers.

    It provides a low friction coefficient of about 0.05–0.09 and excellent extreme-pressure and anti-galling properties.

    It is stable from cryogenic temperatures up to about 400 °C in air and higher in vacuum or inert gas.

    It is insoluble in water and resistant to most acids and solvents.

    It is added to lithium or lithium-complex greases at about 1–3% to make moly grease for CV joints, bearings and chassis points.

    It is used in brake linings, pads and clutch facings to stabilize friction, reduce noise and reduce wear.

    It is blended into nylon, PTFE and POM to create self-lubricating gears, bushings and slider pads.

    It is used in dry-film lubricants and bonded coatings for aerospace and automotive fasteners.

    It improves service life and conductivity of carbon brushes in electric motors.

    It is also used in powder metallurgy and selected catalytic applications.

    Confirm appearance, MoS2 content, acid-insoluble matter, iron, MoO3, moisture, oil absorption, particle size, sieve residue, bulk density and pH.

    Store in a cool, dry, well-ventilated warehouse, keeping the powder dry to avoid slow oxidation to molybdenum trioxide.

    Keep containers tightly sealed when not in use and avoid contact with strong oxidizing agents.

    Confirm packaging with the requested quantity and destination requirements.

    The page is an RFQ entry point and does not state stock, price, MOQ or fixed lead time.

    For an RFQ, state the intended use, required purity, particle size and grade, quantity, packaging, destination and document needs.

    FAQ - Technical & Supply Chain

    • Q:

      What is Molybdenum Disulfide CAS 1317-33-5?

      A: Molybdenum Disulfide CAS 1317-33-5 is molybdenum(IV) sulfide, with the formula MoS2 and molecular weight about 160.07 g/mol. It is a dark gray to black solid supplied as a fine powder for lubrication and other high-performance applications.
    • Q:

      Why is Molybdenum Disulfide an effective dry lubricant?

      A: Its layered hexagonal structure has weak van der Waals forces between sulfur layers, allowing them to slide easily under load. This reduces friction, prevents metal-to-metal contact, and helps resist galling in boundary and extreme-pressure conditions.
    • Q:

      What is the difference between fine, superfine, and grease grades?

      A: The grades differ mainly in particle size, purity, oil absorption, and sieve residue. Superfine or micronized grades are often selected for stable dispersion in greases and plastics, while coarser technical grades may be used where particle fineness is less critical.
    • Q:

      What temperature limits apply to Molybdenum Disulfide?

      A: It can perform from cryogenic conditions up to about 400 C in air, and higher temperatures are possible in vacuum or inert gas. Above the practical air-stability limit, oxidation to molybdenum trioxide becomes a concern.
    • Q:

      What applications use Molybdenum Disulfide besides grease?

      A: It is used in dry-film coatings, plastics and polymer composites, brake and clutch linings, powder metallurgy, and some catalytic applications. In these uses it improves lubricity, wear resistance, and processing behavior.

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