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Product Name: Dimethyl Sulfide Chemical Formula: C2H6S CAS Number: 75-18-3 EC Number: 200-846-2 Synonyms: Methylthiomethane, Thioether, DMS Intended Uses: Laboratory reagent, industrial intermediate, flavoring agent in trace amounts Manufacturer Information: Supply chain and manufacturer contacts listed on shipment paperwork; emergency phone numbers included on all labels Emergency Numbers: National Poison Control Center, local fire department, CHEMTREC +1-800-424-9300
Classification: Flammable liquid (Category 2); Acute toxicity, oral/inhalation (Category 4); Aquatic Acute Hazard (Category 2) Label Elements: Signal word: Danger; pictograms: Flame, Exclamation mark, Environment Hazard Statements: Highly flammable liquid and vapor. Harmful if inhaled or swallowed. May cause irritation to eyes, skin, and respiratory tract. Toxic to aquatic organisms. Precautionary Statements: Avoid breathing vapors. Use only non-sparking tools. Keep container tightly closed. Wash exposed skin thoroughly after handling. Other Hazards: Vapors may accumulate in low areas; ignition sources can cause flash fire. Releases hydrogen sulfide during decomposition, which is highly toxic.
Chemical Identity: Dimethyl Sulfide Concentration: 99% or higher for laboratory and industrial use Impurities: Trace organosulfur byproducts, water (<0.5%) Molecular Weight: 62.13 g/mol Physical Appearance: Colorless liquid with a strong, disagreeable odor
Inhalation: Remove to fresh air immediately. Seek medical attention for symptoms such as dizziness, headache, or shortness of breath. Oxygen or artificial respiration by trained personnel if breathing is difficult. Skin Contact: Wash with soap and plenty of water for at least 15 minutes. Remove contaminated clothing and wash before reuse. Obtain medical attention for persistent irritation or burns. Eye Contact: Rinse cautiously with water for several minutes, lifting eyelids to ensure complete removal of chemical. Remove contact lenses if present and continue rinsing. Get medical attention if irritation persists. Ingestion: Rinse mouth thoroughly with water, do not induce vomiting. Never give anything by mouth to an unconscious person. Seek medical help without delay.
Suitable Extinguishing Media: Use dry chemical, CO2, foam or water spray to control fire. Specific Hazards: Vapors can travel to a source of ignition and flash back. Produces toxic gases including sulfur oxides, carbon monoxide, and hydrogen sulfide during combustion. Containers may vent violently or rupture under fire conditions. Protective Equipment: Self-contained breathing apparatus (SCBA) and full protective gear for fire fighters. Advice for Firefighters: Evacuate area; cool unopened containers with water spray. Avoid inhalation of combustion products.
Personal Precautions: Evacuate unprotected personnel. Ventilate area. Remove all sources of ignition. Wear chemical resistant gloves, goggles, and protective clothing. Environmental Precautions: Prevent release into sewers or waterways. Notify relevant authorities of spills or leaks. Methods for Cleanup: Absorb with non-combustible material (sand, diatomaceous earth), then shovel into approved waste container. Flush area with water if safe. Dispose according to regulations.
Handling: Work in a chemical fume hood or well-ventilated area. Keep away from heat, sparks, open flames, and hot surfaces. Use non-sparking tools and explosion-proof equipment. Avoid inhalation and direct contact. Ground and bond containers during transfer. Storage Conditions: Store in tightly sealed containers made of compatible materials in a cool, dry, well-ventilated place. Keep away from oxidizing agents, acids, and ignition sources. Use secondary containment where feasible. Follow local and national storage regulations.
Occupational Exposure Limits: OSHA PEL: 10 ppm (ceiling), ACGIH TLV: 10 ppm (TWA) Engineering Controls: Local exhaust ventilation, chemical fume hood Personal Protective Equipment (PPE): Protective gloves (neoprene, nitrile), splash-resistant safety goggles, flame-resistant lab coat, chemical resistant footwear; respirator if adequate ventilation cannot be ensured Hygiene Measures: Wash hands before breaks and at end of work, remove contaminated clothing immediately
Appearance: Colorless liquid Odor: Strong, garlic-like Odor Threshold: Detectable at 0.001 ppm pH: Neutral Melting Point: -98 °C Boiling Point: 37 °C Flash Point: -36 °C (closed cup) Evaporation Rate: Rapid Flammability: Flammable liquid Vapor Pressure: 475 mmHg at 20 °C Vapor Density: 2.1 (Air = 1) Solubility: Slightly soluble in water, miscible with most organic solvents Partition Coefficient: log Kow 1.77 Auto-Ignition Temperature: 206 °C Decomposition Temperature: Data not available Viscosity: Low viscosity, similar to other thiols and alkyl sulfides Density: 0.85 g/cm³ at 20 °C Explosive Properties: Not explosive, but vapors form explosive mixtures with air Oxidizing Properties: Non-oxidizing
Chemical Stability: Stable under recommended storage and handling; unstable if exposed to heat, flames, strong oxidizers Reactivity: Reacts with strong oxidizing agents, acids, and bases Hazardous Reactions: Polymerization does not occur; ignition possible in presence of static discharge or heat Hazardous Decomposition Products: Sulfur oxides, hydrogen sulfide, carbon monoxide, carbon dioxide Conditions to Avoid: Open flames, spark sources, heat, direct sunlight, and static discharge Incompatible Materials: Nitric acid, chlorine, peroxides, strong alkalis
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion Acute Toxicity: Oral LD50 (rat): 820 mg/kg; Inhalation LC50 21 mg/L (rat, 4 hr) Symptoms of Exposure: Drowsiness, headache, dizziness, eye/skin irritation, nausea, respiratory depression Chronic Effects: No evidence for carcinogenicity or reproductive toxicity in humans; persistent exposure may cause CNS depression Sensitization: Not considered a skin sensitizer Other Information: Prolonged or repeated exposure may affect liver and kidney function
Aquatic Toxicity: Harmful to fish and aquatic organisms (LC50 (fish, 96hr): 2—7 mg/L) Persistence and Degradability: Readily biodegradable in soil and water under aerobic conditions Bioaccumulation: Low potential for bioaccumulation (BCF < 10) Mobility in Soil: Moderate vapor phase mobility, may volatilize rapidly Other Adverse Effects: Toxic to aquatic life at low concentrations; vapors pose hazard for plants and small mammals if released uncontrolled into ecosystem
Disposal Methods: Dispose of in accordance with local, state, and federal environmental regulations; never discharge to sewage systems or open waterways Contaminated Packaging: Triple-rinse, puncture, and send to licensed waste facility; label containers as hazardous Incineration: Chemical incineration under controlled conditions at an approved waste disposal facility is the preferred option Precautions: Wear protective clothing and avoid exposure to vapor during handling and disposal
UN Number: UN 2384 UN Proper Shipping Name: Dimethyl Sulfide Transport Hazard Class: 3 (Flammable Liquids) Packing Group: II Environmental Hazards: Marine pollutant according to IMDG code Transport Labels: Flammable liquid label required Special Precautions: Segregate from oxidizers, ensure good ventilation during transport, use explosion-proof containers, follow DOT and IATA instructions
OSHA Compliance: Covered under OSHA Hazard Communication Standard, 29 CFR 1910.1200 EPA Listings: RCRA hazardous waste (U084), regulated under CERCLA and SARA Title III for reportable quantities TSCA: Listed in TSCA Chemical Substance Inventory EU Regulations: Classified as dangerous under EC Regulation 1272/2008 (CLP); subject to REACH registration Other Regulations: Canadian DSL/NDSL, Australia AICS, Japan ENCS, Korea ECL, and Philippines PICCS inventories Workplace Safety: Employers must provide adequate ventilation, fire prevention systems, and safety training on GHS labeling and emergency response
