Specialty Additives Available — Bulk Only

Methylsulfonylmethane (MSM)

CAS 67-71-0 · Formula C2H6O2S · MW 94.14 g/mol

A crystalline organosulfur solid that doubles as a high-boiling polar solvent and supplement-grade sulfur source. It is used as a polar solvent and as a dietary-supplement ingredient.

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HS Code
2930.90
At a Glance
Material Family
Specialty Additives
Record Type
Pure compound
Primary Role
Solvency · Viscosity Modification
Functional Roles
DIMETHYL SULFONE
SOLVENTVISCOSITY CONTROLLING
Applications & Use Cases
  • Solvent: High-boiling polar solvent for organic and inorganic solutes
  • Dietary supplements: Organosulfur ingredient in supplement blends
  • Granular grade: 40-mesh particle size for consistent blending
Physical Properties
Melting Point
109 °C
Boiling Point
237.00 to 239.00 °C. @ 760.00 mm Hg
Vapor Pressure
5.15
Safety & Handling
Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

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HS / Tariff Classification
Harmonized System (HS) Code — 6-digit international heading
2930 . 90
Chapter 29
Organic chemicals
Heading 29.30
Internationally harmonized (WCO HS)
Subheading 2930.90
6-digit international code — national tariff line adds further digits
Chemical Identity
CAS Number
67-71-0
Molecular Formula
C2H6O2S
Molecular Weight
94.14 g/mol
IUPAC Name
methylsulfonylmethane
INCI Name
DIMETHYL SULFONE
PubChem CID
InChI Key
HHVIBTZHLRERCL-UHFFFAOYSA-N
Synonyms & Trade Names
Dimethyl sulfone Methyl sulfone Methylsulfonylmethane Dimethyl sulphone Sulfonylbismethane Methane, sulfonylbis- sulfonyldimethane METHYL SULFONYL METHANE Methylsulfonyl methane methyl sulfonmethane MSM2000 Premium SUL VITAL HOT
Full Description

Methylsulfonylmethane (CAS 67-71-0), or dimethyl sulfone ((CH3)2SO2), is a high-purity organosulfur compound supplied as a 40-mesh granular grade. It is used as a polar solvent and as a dietary-supplement ingredient.

Frequently Asked Questions

What is methylsulfonylmethane (MSM)?

MSM (CAS 67-71-0), or dimethyl sulfone ((CH3)2SO2), is a high-purity organosulfur compound. RawSource supplies it as a 40-mesh granular grade used as a polar solvent and as an ingredient in dietary-supplement blends.

What does the 40-mesh designation mean?

40 mesh specifies the particle size of the granular grade, controlling flow and blending consistency in dry formulations. The 40-mesh grade is supplied for uniform mixing in supplement and process blends.

Is MSM the same as DMSO?

No. MSM is dimethyl sulfone ((CH3)2SO2, CAS 67-71-0), a solid; DMSO is dimethyl sulfoxide, a liquid. MSM is the more fully oxidized (sulfone) compound, while DMSO is the sulfoxide.

What is methylsulfonylmethane used for industrially?

As dimethyl sulfone, it serves as a high-boiling polar solvent for organic and inorganic solutes and as an organosulfur ingredient in supplement blends. The CAS number is 67-71-0 and the HS code is 2930.90 (organo-sulfur compounds, other).

What bulk packaging and documentation are available?

RawSource supplies the 40-mesh granular grade in bulk with a Certificate of Analysis and Safety Data Sheet per shipment. Request a bulk quote with your target volume and grade for current pricing and lead time.

Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.