Material Safety Data Sheet: Dioctyl Sulfide
Identification
Product Name: Dioctyl Sulfide
Synonyms: Bis(2-ethylhexyl) sulfide, Di(2-ethylhexyl) sulfide
CAS Number: 25339-56-4
Molecular Formula: C16H34S
Molecular Weight: 258.51 g/mol
Recommended Use: Industrial lubricant, plasticizer, intermediate in organic synthesis
Supplier Details: Manufacturer address, emergency contact number, business telephone
Emergency Telephone: Chemtrec (US): 1-800-424-9300
Hazard Identification
GHS Classification: Not classified as hazardous under GHS
Signal Word: No signal word required
Hazard Statements: None assigned under GHS
Precautionary Statements: Avoid contact with skin and eyes. Do not breathe mist/vapours. Use only in well-ventilated areas.
Potential Health Effects: Inhalation can cause mild respiratory irritation. Skin exposure might produce irritation after prolonged contact, and eyes may sting on exposure.
NFPA Ratings: Health: 1, Flammability: 1, Reactivity: 0
Label Elements: None required based on available data; still, safe handling suggested.
Composition / Information on Ingredients
Chemical Name: Dioctyl Sulfide
Concentration: >99% by weight
Impurities: Less than 1%, may contain trace amounts of related alkyl sulfides
CAS Number: 25339-56-4
EC Number: 246-848-6
First Aid Measures
Inhalation: Move person to fresh air. Seek medical attention if symptoms like coughing or difficulty breathing develop.
Skin Contact: Wash affected skin thoroughly with soap and water for several minutes. Remove contaminated clothing and wash before reuse.
Eye Contact: Flush eyes with plenty of water for at least 15 minutes. If irritation persists, call a physician.
Ingestion: Rinse mouth. Do not induce vomiting. Seek medical attention for large quantities or if feeling unwell.
Note to Physician: Treat symptomatically. No specific antidote is known; support vital functions in serious cases.
Fire-Fighting Measures
Suitable Extinguishing Media: Foam, dry chemical, carbon dioxide, sand for small fires; water spray for larger fires.
Unsuitable Extinguishing Media: Direct water jets may spread product and are to be avoided.
Specific Hazards: Fumes of carbon monoxide, carbon dioxide, and sulfur oxides could be released on burning.
Protective Equipment: Firefighters should wear self-contained breathing apparatus and full protective gear.
Fire-fighting Procedures: Move containers from fire area if you can do so without risk. Cool containers with water spray to prevent pressure build-up and potential explosion.
Accidental Release Measures
Personal Precautions: Use personal protective equipment as outlined in Section 8. Ensure adequate ventilation. Avoid breathing vapors.
Environmental Precautions: Prevent further leakage or spillage if safe to do so. Do not let product enter drains, waterways, or soil.
Methods for Cleanup: Absorb spill with inert material (e.g., sand, earth), then place in suitable container for disposal. Avoid using combustible cleaning tools.
Decontamination: Wash spill area with plenty of soap and water after clean-up. Ventilate the area to dissipate any vapors.
Disposal of Collected Material: See Disposal Considerations section for proper methods.
Handling and Storage
Handling: Use in a well-ventilated area. Wear appropriate personal protection to minimize skin and eye contact. Wash thoroughly after handling; keep containers tightly closed during use.
Storage: Store in a cool, dry, well-ventilated area. Keep away from direct sunlight, open flames, and incompatible materials such as strong oxidizers. Store in suitable, labeled containers.
Incompatible Materials: Strong acids, bases, and oxidizing substances can trigger reactions.
Packaging Materials: Use HDPE drums, steel containers with compatible linings, avoid copper and its alloys for storage.
Exposure Controls and Personal Protection
Exposure Limits: No OSHA or ACGIH exposure limits established for this compound.
Engineering Controls: Use local exhaust ventilation or process enclosures to minimize airborne concentrations. Wash hands after contact.
Personal Protective Equipment (PPE):
- Eye Protection: Safety glasses with side shields or chemical splash goggles.
- Skin Protection: Chemical-resistant gloves such as nitrile, protective clothing like aprons or lab coats.
- Respiratory Protection: Not normally required, but use an approved respirator for prolonged high exposure situations or during emergencies.
- Other: Emergency eye wash and shower stations near work area.
Physical and Chemical Properties
Appearance: Colorless to pale yellow liquid
Odor: Mild, characteristic
Boiling Point: 330 – 340°C (626 – 644°F)
Melting Point: -52°C (-61.6°F)
Flash Point: 192°C (378°F) (closed cup)
Auto-Ignition Temperature: Not established
Vapor Pressure: < 0.01 mmHg @ 20°C
Density: 0.87 – 0.88 g/cm³ @ 25°C
Solubility: Practically insoluble in water; soluble in hydrocarbons
Viscosity: 16 cSt @ 40°C
Evaporation Rate: Negligible
pH: Not applicable
Partition Coefficient (log Kow): ~7.8 (highly lipophilic)
Stability and Reactivity
Chemical Stability: Stable under normal temperatures and pressures.
Reactivity: Low. Product does not react violently with water or common materials.
Conditions to Avoid: Excessive heat, ignition sources, open flames, prolonged exposure to air
Incompatible Materials: Strong oxidizers (e.g., peroxides, nitrates), acids
Hazardous Decomposition Products: Combustion can produce carbon monoxide, carbon dioxide, sulfur oxides
Polymerization: Does not polymerize
Toxicological Information
Acute Toxicity: Low oral and dermal toxicity reported in animal studies.
Skin Corrosion/Irritation: Prolonged or repeated skin contact may cause mild irritation; no significant burns or blisters.
Serious Eye Damage/Irritation: May cause transient redness or discomfort.
Respiratory or Skin Sensitization: Data indicates low potential for sensitization.
Germ Cell Mutagenicity: No evidence of mutagenicity based on available information.
Carcinogenicity: Not classified as carcinogenic; not on NTP, IARC, or OSHA lists.
Reproductive Toxicity: No evidence from available studies.
STOT - Single and Repeated Exposure: No target organ effects identified.
Potential Routes of Exposure: Inhalation, skin and eye contact, ingestion
Synergistic Effects: No data available on potentiation with other chemicals.
Ecological Information
Ecotoxicity: Very toxic to aquatic organisms with potential to cause long-term adverse effects in the aquatic environment.
Aquatic Toxicity: LC50 (fish): >100 mg/L (96 hour, methodology may vary between species).
Persistence and Degradability: Difficult to biodegrade, remains in environmental media for extended periods.
Bioaccumulative Potential: High; log Kow value suggests accumulation in aquatic organisms.
Mobility in Soil: Low mobility due to high hydrophobicity; adsorbs to organic matter
Other Adverse Effects: No known ozone depletion, greenhouse gas, or endocrine disruption properties.
Disposal Considerations
Waste Treatment Methods: Incinerate at high temperature in facilities compliant with local regulations. Use licensed waste disposal contractors where possible.
Container Disposal: Treat contaminated containers as hazardous waste. Clean before recycling or disposal.
Disposal of Unused Product: Do not release into watercourses, drains, or environment. Dispose of at approved hazardous waste facilities.
Relevant Local/Regional Regulations: Compliance with EPA, state, and local environmental control agencies is required.
Transport Information
UN Number: Not required for this material.
Proper Shipping Name: Dioctyl Sulfide or Not Regulated
Transport Hazard Class: Not classified as dangerous for transport.
Packing Group: N/A
Marine Pollutant: Not regulated but may impact aquatic environments if released.
Special Precautions: Protect containers from damage and leaks during transport. Avoid high temperatures and ignition sources. Secure all loads during transit.
Regulatory Information
TSCA (US): Listed
EINECS/ELINCS (Europe): Listed (EC 246-848-6)
REACH Registration: Product registered as required in the EU.
SARA Title III: Not subject to reporting; not a Section 302 or 313 listed substance.
OSHA Hazard Communication: Not considered hazardous under 29 CFR 1910.1200
California Prop 65: Not listed
Other International Inventories: Australia (AICS): Listed; Canada (DSL): Listed; Japan (ENCS): Listed; Korea (ECL): Listed.
Labelling Requirements: No specific hazard labelling required in the US, observe national and local requirements.
