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Chemical Name: Dimethyl sulfide
Common Names: Methylthiomethane, DMS
CAS Number: 75-18-3
Appearance: Colorless liquid
Odor: Characteristic unpleasant, cabbage-like smell
Uses: Used in chemical manufacturing, flavor industry, and as a solvent
Molecular Formula: C2H6S
Acute Health Hazards: Irritates eyes, skin, and respiratory system; headaches and nausea may follow exposure
Flammability: Highly flammable liquid and vapor, forms explosive mixtures with air
Chronic Effects: Prolonged exposure can aggravate respiratory conditions
Environmental Hazards: Toxic to aquatic life
Signal Words: Danger, Flammable, Irritant
Chemical: Dimethyl sulfide
Concentration: Nearly pure in most commercial samples
Impurities: May contain trace sulfur compounds which can increase flammability or toxicity
Inhalation: Remove the person to fresh air, keep them at rest, and seek medical attention if symptoms worsen
Skin Contact: Wash thoroughly with soap and water, remove contaminated clothing
Eye Contact: Rinse immediately with plenty of water for at least 15 minutes, and seek medical care if irritation persists
Ingestion: Rinse mouth, do not induce vomiting, and get medical help right away
Suitable Extinguishing Media: Use foam, dry chemical, or carbon dioxide extinguishers
Fire Hazards: Vapors can travel to an ignition source and flashback; produces toxic gases such as sulfur dioxide when burned
Protective Actions: Wear full protective gear and self-contained breathing apparatus; stay upwind and avoid breathing fumes
Special Precautions: Containers may explode in a fire; cool containers with water spray from a safe distance
Personal Precautions: Evacuate area, ventilate, avoid breathing vapors, wear gloves and splash goggles
Spill Response: Absorb liquid with inert material like sand or vermiculite, collect in closed containers
Environmental Precautions: Prevent entry into sewers or waterways, report major spills as required by local regulations
Handling Practices: Work in well-ventilated locations, use spark-proof tools, ground all equipment, avoid contact with skin and eyes
Storage Needs: Store in tightly closed containers, in a cool, dry, well-ventilated place; away from heat, sparks, open flame
Incompatibilities: Keep away from strong oxidizers, acids, sources of ignition
Engineering Controls: Use local exhaust ventilation to minimize vapor exposure, keep below regulatory limits
Personal Protective Equipment: Chemical-resistant gloves, safety goggles, flame-retardant clothing
Respiratory Protection: Use approved respirator if occupational exposure exceeds limits or if vapor concentration increases
Hygiene: Wash hands after handling, do not eat or smoke in work areas, keep work clothes separate
Appearance: Clear, colorless liquid
Odor: Strong, sulfurous, similar to cooked cabbage
Boiling Point: Around 37°C (99°F)
Melting Point: About -98°C (-144°F)
Flash Point: -36°C (-33°F) (closed cup), reflects high flammability
Solubility: Slightly soluble in water, mixes well with common organic solvents
Vapor Pressure: High at room temperature; vapor can easily spread
Density: Around 0.85 g/cm³
Chemical Stability: Stable under recommended storage conditions, flammable in presence of ignition sources
Reactivity Risks: Reacts with oxidizers, acids, peroxides
Hazardous Decomposition Products: Burns to release sulfur oxides and, under some conditions, can yield other toxic gases
Routes of Exposure: Inhalation, skin and eye contact, ingestion
Symptoms: Dizziness, headache, nausea, irritation to eyes and respiratory system
Sensitization: No significant evidence of allergenic reactions but can worsen asthma
Repeated Exposure: Chronic effects include possible damage to respiratory epithelium
Acute Toxicity: Can be dangerous at high concentrations, especially in enclosed spaces
Aquatic Effects: Harmful to aquatic organisms; may cause long-term adverse effects
Persistence: Volatilizes quickly from water and soil
Bioaccumulation: Not known to bioaccumulate significantly, but high volatility increases air pollution risk
Environmental Transport: Vapors move rapidly and can travel significant distances
Waste Handling: Collect as hazardous waste, do not pour down drains
Disposal Methods: Incinerate or chemically destroy with suitable treatment in line with local regulations
Container Disposal: Rinse thoroughly, but treat rinsewaters and residues as hazardous
UN Number: 1163
Shipping Name: Dimethyl sulfide
Hazard Class: Flammable liquid
Packing Group: II (substances presenting medium danger)
Transport Precautions: Protect from heat, secure containers upright, ensure proper ventilation during transit
Labeling Requirements: Flammable liquid, toxic vapors, environmental risk
Workplace Limits: Occupational exposure standards exist in many countries— refer to OSHA, NIOSH, or equivalent authorities
Other Rules: Subject to chemical reporting and accident prevention laws; always check up-to-date regional and international rules for safe handling and emergency planning
