Molybdenum(IV) sulfide
Molybdenum(IV) sulfide (CAS: 1317-33-5; Formula: MoS2; Molar Mass: 160.07 g/mol) is a chemical compound recognized for its layered structure, similar to graphite. This characteristic imparts remarkable lubricating properties. It is widely employed as a solid lubricant, an additive in greases and oils, and in the development of advanced materials due to its unique electronic and tribological properties.
- IUPAC
- Molybdenum disulfide
- Synonyms
- Molybdenum disulfide

Solid Lubricant
MoS2 functions as an excellent dry lubricant, particularly in vacuum or high-temperature environments where conventional liquid lubricants are unsuitable. Its layered structure allows for easy shearing between layers, reducing friction.
Additive for Greases and Oils
Incorporated into lubricating oils and greases, molybdenum disulfide enhances load-carrying capacity and reduces wear. It provides superior protection under extreme pressure conditions.
Catalysis
Molybdenum disulfide is used as a catalyst in various industrial processes, notably in hydrodesulfurization (HDS) reactions within the petroleum refining industry.
Materials Science Research
As a semiconductor material with a layered structure, MoS2 is a subject of intense research for applications in electronics, optoelectronics, and energy storage devices.
| Molecular weight | 160.07 |
|---|---|
| Empirical formula | MoS2 |
| Assay | 99% |
| Density | 5.06 g/mL at 25 °C(lit.) |
| Particle size | <2 μm |

Hazard statements
- H332Harmful if inhaled
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | nwg |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Molybdenum(IV) sulfide used for?
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Molybdenum(IV) sulfide (CAS: 1317-33-5) is primarily used as a solid lubricant, an additive in greases and oils to enhance performance under extreme pressure, and as a catalyst in industrial processes like hydrodesulfurization. It is also explored for use in advanced electronic and optoelectronic materials.
What is the CAS number and chemical formula for Molybdenum(IV) sulfide?
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The CAS number for Molybdenum(IV) sulfide is 1317-33-5, and its chemical formula is MoS2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Molybdenum(IV) sulfide with an assay of 99%. This product is typically considered a technical or research grade and is not represented as USP, BP, or EP grade.
How should Molybdenum(IV) sulfide be handled safely?
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Molybdenum(IV) sulfide is classified with the GHS signal word 'Warning' and has hazard statement H332 (Harmful if inhaled). It is recommended to use safety measures such as eyeshields and gloves, and a type N95 (US) or type P1 (EN143) respirator filter when handling this compound to avoid inhalation.
Is Molybdenum(IV) sulfide a controlled substance?
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Based on the provided data, there is no indication that Molybdenum(IV) sulfide (CAS: 1317-33-5) is a controlled substance.
How is Molybdenum(IV) sulfide packed and shipped?
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Molybdenum(IV) sulfide is carefully packed to ensure product integrity during transit. TSS offers global export services for this chemical.
How can I request a quote or sample for Molybdenum(IV) sulfide?
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To request a quote or a sample of Molybdenum(IV) sulfide, please contact our sales team through the website or your designated account manager.
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