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Name: Methyl sulfide, also known as dimethyl sulfide
Chemical Formula: C2H6S
Appearance: Colorless liquid with a characteristic disagreeable odor, similar to rotten cabbage
Odor Threshold: Less than 1 part per billion; pungent and easily detected
Uses: Industrial solvent, intermediate in chemical synthesis, found in pulp and paper mills, and sometimes released from natural sources
Hazard Statements: Highly flammable liquid and vapor, harmful if inhaled, causes skin and eye irritation, toxic to aquatic life
GHS Pictograms: Flame, Exclamation Mark, Environment
Major Routes of Exposure: Inhalation, skin and eye contact
Short-term Effects: Dizziness, headache, nausea, irritation of eyes, nose, and throat
Long-term Effects: Prolonged exposure can lead to central nervous system effects and possible impairment
Main Component: Dimethyl sulfide (C2H6S), purity usually above 99% in industrial grades
Common Impurities: Water, minor organosulfur compounds
Concentration: Pure forms contain negligible dilution
Inhalation: Remove person to fresh air immediately. If breathing is difficult or symptoms persist, seek medical attention.
Skin Contact: Wash with soap and plenty of water. Remove contaminated clothing and launder before reuse.
Eye Contact: Rinse cautiously with water for several minutes. If irritation develops, consult a physician.
Ingestion: Do not induce vomiting. Rinse mouth and seek medical care if feeling unwell.
Suitable Extinguishing Media: Dry chemical, carbon dioxide, foam. Water spray may be used to cool containers.
Fire Hazards: Vapors form explosive mixtures with air, move easily and may travel to distant ignition sources, producing flashback.
Decomposition: Burning produces toxic gases such as sulfur oxides and carbon monoxide.
Protective Equipment: Firefighters should use full protective gear and self-contained breathing apparatus
Evacuation: Keep area clear, evacuate non-essential personnel
Containment: Stop leaks if safe, use non-sparking tools, prevent entry into drains and environment
Clean-up: Absorb with non-combustible materials (sand, earth), ventilate area, dispose in accordance with regulations
Personal Protection: Proper respiratory protection and chemical-resistant gloves
Handling: Only trained personnel should handle methyl sulfide, always in well-ventilated spaces or with proper engineering controls such as hoods or exhaust systems
Storage: Store in tightly closed containers, kept in cool, dry, well-ventilated places away from heat sources, open flames, oxidizers and acids
Precaution: Ground and bond containers to prevent electrostatic discharge, use spark-proof tools, avoid vapor buildup
Engineering Controls: Local exhaust ventilation, process enclosure, and leak detection systems limit airborne concentration
Personal Protective Equipment: Chemical splash goggles, gloves made from appropriate resistant materials (such as nitrile or neoprene), flame-resistant clothing
Respiratory Protection: Approved respirators for high concentrations, particularly in poorly ventilated areas
Hygiene Measures: Wash hands thoroughly after handling, do not eat or drink around chemicals, promptly remove contaminated clothing
Physical State: Volatile liquid
Boiling Point: Around 37 °C (98.6 °F)
Melting Point: -98 °C (-144 °F)
Density: Approximately 0.85 g/cm³ at 20 °C
Solubility: Slightly soluble in water, readily soluble in organic solvents
Vapor Pressure: High at room temperature, easily forms vapor
Flash Point: -36 °C (-33 °F), making it a clear fire risk
Odor: Potent, distinctive, can be used for leak detection but does not substitute for safety controls
Stability: Stable in recommended storage conditions, volatile and reactive with strong oxidizers
Reactivity: Rapid reactions with oxidizing agents may cause fire or explosions
Hazardous Decomposition: Produces sulfur oxides, carbon oxides on burning
Incompatible Materials: Halogens, perchlorates, nitrates, acids
Acute Toxicity: Inhalation causes eye and respiratory irritation, possible headaches, nausea, and dizziness, severe exposure may lead to unconsciousness
Chronic Toxicity: Prolonged inhalation tied to respiratory system effects, nervous system depression
Skin and Eye Effects: Redness, burning, potential for dermatitis with repeated exposure
Carcinogenicity: Methyl sulfide is not classified as a human carcinogen by major regulatory agencies
Ecotoxicity: Harmful to aquatic organisms even in low concentrations, persistent in odor detection but degrades in the environment over time
Environmental Fate: Volatilizes rapidly from soil and water, runs risk of atmospheric accumulation and breakdown
Bioaccumulation: Potential for build-up is limited, but spills and releases have highly disruptive short-term effects
Waste Disposal: Incinerate liquid and contaminated solids at approved facilities, accord with local, regional, and national regulations
Do Not: Pour into drains, waterways, or on soil, always consult environmental authorities before disposal
Container Disposal: Triple rinse, puncture, and send to proper chemical waste handler
Transport Hazards: Classified as a hazardous material, flammable liquid, and must be clearly labeled for transport by land, sea, or air
Packaging: Use approved corrosion-resistant containers, full labeling for emergency responders
Transport Restrictions: Take precautions to avoid heat, sparks, and jostling, emergency procedures should be in place
Governing Rules: Subject to strict controls under OSHA, EPA, and similar authorities in most countries
Worker Protections: Safety training and written procedures required, ongoing air monitoring for exposure in workplaces
Environmental Laws: Reporting requirements for spills, regulated release limits, emergency planning
