Material Safety Data Sheet for Methyl Sulfonyl Methane (MSM)

Identification

Product Name: Methyl Sulfonyl Methane
Synonyms: Dimethyl sulfone, DMSO2
Chemical Formula: C2H6O2S
CAS Number: 67-71-0
Recommended Use: Dietary supplement, joint health product, cosmetic ingredient
Manufacturer/Supplier: Contact details and emergency telephone number according to regional requirements

Hazard Identification

GHS Classification: Not classified as hazardous
Signal Word: None required
Hazard Statements: No significant hazards identified under normal conditions
Precautionary Statements: Avoid breathing dust; use adequate ventilation; wash hands after handling
Physical Hazards: May cause minor eye or respiratory irritation in dust form
Environmental Hazards: Not classified as environmentally hazardous

Composition / Information on Ingredients

Chemical Name: Methyl Sulfonyl Methane
Concentration: >99% pure
Impurities: None considered hazardous according to current regulations
Molecular Weight: 94.13 g/mol

First Aid Measures

Inhalation: Move person to fresh air; seek medical advice if symptoms persist
Skin Contact: Wash with soap and water if irritation occurs
Eye Contact: Rinse eyes gently with water for at least 15 minutes, lift upper and lower eyelids, seek medical attention if needed
Ingestion: Rinse mouth with water; seek medical attention if feeling unwell
Most Important Symptoms: May cause mild irritation; allergic reactions are rare

Fire-Fighting Measures

Suitable Extinguishing Media: Water spray, dry chemical, CO2, foam
Specific Hazards: Product does not ignite easily; melting may occur at high temperatures
Protection for Firefighters: Wear full protective gear and self-contained breathing apparatus
Fire/Explosion Data: Not considered an explosive hazard; no unusual fire or explosion hazards noted

Accidental Release Measures

Personal Precautions: Use dust mask and gloves; ventilate area
Spill Response: Sweep up material, avoid generating dust; collect in suitable container for disposal
Environmental Precautions: Prevent large quantities from entering drains or waterways
Clean-up Methods: Wash area after pick-up; use standard cleaning agents

Handling and Storage

Handling Advice: Avoid dust formation; wear protective clothing when handling large amounts
Storage Conditions: Store in a cool, dry, well-ventilated area; keep container tightly sealed
Incompatibilities: Strong oxidizing agents
Hygiene Practices: Wash hands after use; do not eat, drink, or smoke while handling

Exposure Controls and Personal Protection

Exposure Limits: No occupational exposure limits established
Engineering Controls: General ventilation is recommended; local exhaust for dust
Personal Protective Equipment: Dust mask, safety glasses, gloves recommended for bulk handling
Other Protection: Use protective clothing as necessary to reduce skin and eye exposure

Physical and Chemical Properties

Appearance: White crystalline powder
Odor: Almost odorless
Melting Point: 109 – 111°C
Boiling Point: 238°C
Solubility: Soluble in water and polar solvents
Density: 1.31 g/cm³ at 20°C
pH: Neutral (6.5 - 7.5 for 10% solution)
Vapor Pressure: Very low at room temperature

Stability and Reactivity

Chemical Stability: Stable under normal temperatures and pressures
Reactivity: Chemically inert under most conditions
Conditions to Avoid: High temperatures, contact with strong oxidants
Decomposition Products: Sulfur oxides, carbon oxides under fire conditions

Toxicological Information

Acute Toxicity: LD50 (oral, rat): >17,000 mg/kg
Inhalation: Low toxicity; dust may irritate mucous membranes
Skin Contact: No evidence of sensitization or systemic toxicity
Eye Contact: May cause temporary mild irritation
Chronic Effects: No known carcinogenic, mutagenic or reproductive hazards
Sensitization: Not expected under normal use

Ecological Information

Aquatic Toxicity: Low potential for bioaccumulation; minimal aquatic toxicity
Persistence and Degradability: Readily biodegradable in the environment
Mobility: High water solubility supports rapid dispersion in water
Other Adverse Effects: Not expected to have significant environmental impact at typical use levels

Disposal Considerations

Waste Methods: Dispose of in compliance with local, national and regional regulations; process as non-hazardous waste
Contaminated Packaging: Rinse containers; recycle or dispose of as appropriate
Special Restrictions: Avoid unintentional release into waterways in large quantities

Transport Information

UN Number: Not regulated under current transport guidelines
Transport Hazard Class: Not classified as hazardous for transport
Packing Group: Not assigned
Labeling Requirements: No special requirements
Special Precautions: Avoid spillage and dust formation during loading and transport

Regulatory Information

TSCA Inventory: Listed
EINECS/ELINCS: 200-665-9
Canada DSL: Listed
REACH: Registration not required for natural products under specific tonnage
SARA/OSHA Status: Not regulated as hazardous material
Other Country Regulations: Subject to general chemical product controls; not classified as a controlled substance