MSDS for 2-Ethyl-1-hexanethiol

Identification

Product Name: 2-Ethyl-1-hexanethiol
CAS Number: 15520-10-2
Other Names: 2-Ethylhexane-1-thiol, Octyl mercaptan
Recommended Use: Intermediate for organic synthesis, rubber additive, plasticizer precursor
Supplier Information: Manufacturer/supplier contact information, including address, telephone, and emergency phone number

Hazard Identification

GHS Classification: Flammable liquid, Acute toxicity (oral, dermal, inhalation), Skin corrosion/irritation, Serious eye damage/irritation, Specific target organ toxicity
Signal Word: Danger
Hazard Statements: Highly flammable liquid and vapor; Harmful if swallowed, in contact with skin, or inhaled; Causes skin and eye irritation; May cause respiratory irritation
Pictograms: Flame, exclamation mark
Precautionary Statements: Keep away from heat, sparks, open flames; Wear protective gloves, protective clothing, and eye/face protection; Use only outdoors or in well-ventilated area; Wash thoroughly after handling; Do not eat, drink, or smoke during use

Composition / Information on Ingredients

Chemical Identity: 2-Ethyl-1-hexanethiol
CAS Number: 15520-10-2
EC Number: 239-559-6
Purity: Typically >97%
Impurities: May contain trace byproducts from synthesis, such as 2-ethylhexanol or related mercaptans

First Aid Measures

Inhalation: Move person to fresh air; keep at rest in a position comfortable for breathing; obtain medical attention if symptoms persist
Skin Contact: Remove contaminated clothing immediately; rinse skin with plenty of water and mild soap; seek medical attention for irritation or symptoms
Eye Contact: Rinse cautiously with water for several minutes; remove contact lenses if present; continue rinsing; seek medical advice
Ingestion: Rinse mouth with water; do not induce vomiting; get medical attention if you feel unwell
Most Important Symptoms and Effects: Skin and eye irritation, possible respiratory tract irritation, headache, nausea, dizziness from inhalation
Note to Physician: Treat symptomatically and supportively; monitor respiratory and cardiovascular function

Fire-Fighting Measures

Suitable Extinguishing Media: Dry chemical, alcohol-resistant foam, carbon dioxide, or water spray
Unsuitable Extinguishing Media: Direct water jet may spread fire
Hazards from Combustion: Can emit toxic fumes including sulfur oxides and carbon oxides upon burning
Fire Fighting Instructions: Evacuate area; firefighters wear self-contained breathing apparatus and protective suit; cool containers with water spray
Protective Equipment: Full protective gear, including chemical splash suit and breathing apparatus, recommended for fire response

Accidental Release Measures

Personal Precautions: Evacuate unnecessary personnel; ensure proper ventilation; avoid inhalation and skin/eye contact
Protective Equipment: Chemical-resistant gloves, safety goggles, and suitable protective clothing
Emergency Procedures: Eliminate all sources of ignition; keep incompatible substances away
Spill Cleanup: Absorb with inert material such as sand, earth, or vermiculite; collect in suitable container for disposal; ventilate area and wash spill site thoroughly
Environmental Precautions: Prevent entry into waterways, drains, and soil

Handling and Storage

Handling: Wear appropriate chemical-resistant gloves, clothing, and eye/face protection; avoid breathing vapors; handle only with adequate ventilation; ground/bond container and receiving equipment
Storage Conditions: Store in a tightly-closed original container in a cool, dry, and well-ventilated area; keep away from strong oxidizers, heat, and open flames
Incompatibilities: Oxidizing agents, strong acids, strong bases
Specific End Use: Application as industrial intermediate, research, and process material
Storage Precautions: Protect from moisture, physical damage, and incompatible substances

Exposure Controls and Personal Protection

Exposure Limits: No specific occupational exposure limits established, but minimize exposure using engineering controls
Engineering Controls: Use local exhaust ventilation, process enclosure, and/or general ventilation to limit airborne exposure
Personal Protection: Wear chemical-resistant gloves (nitrile, neoprene), splash-proof safety goggles, and protective clothing
Respiratory Protection: Use approved respirators for vapor or mist as needed
Hygiene Measures: Wash hands thoroughly after handling; remove contaminated clothing and wash before reuse; never eat, drink, or smoke in work areas

Physical and Chemical Properties

Appearance: Clear, colorless to yellowish liquid
Odor: Strong, unpleasant (sulfurous/mercaptan-like)
Odor Threshold: Low, detectable at very low concentrations
pH: Not applicable (not water-soluble)
Melting Point: -74°C
Boiling Point: About 186–188°C
Flash Point: 61°C (closed cup)
Evaporation Rate: Not determined
Flammability: Flammable liquid and vapor
Upper/Lower Flammability Limits: Not determined
Vapor Pressure: Approx. 0.9 mmHg at 25°C
Density: 0.88 g/cm³ at 20°C
Solubility: Slightly soluble in water; soluble in organic solvents
Partition Coefficient (n-octanol/water): Not determined
Viscosity: Not available

Stability and Reactivity

Chemical Stability: Stable under recommended storage conditions
Hazardous Reactions: May react vigorously with strong oxidizers, producing heat and potentially toxic gases
Conditions to Avoid: Excessive heat, flames, sparks, incompatible substances
Incompatible Materials: Strong oxidizing agents, strong acids, alkali metals
Hazardous Decomposition Products: Thermal decomposition can produce sulfur oxides and carbon oxides

Toxicological Information

Routes of Exposure: Inhalation, skin and eye contact, ingestion
Acute Toxicity: Harmful if swallowed, in contact with skin, or inhaled; May cause headache, nausea, respiratory irritation
Skin Irritation: Can cause redness, itching, irritation
Eye Damage/Irritation: Causes severe eye irritation
Chronic Effects: Prolonged or repeated exposure may cause dermatitis, respiratory effects
Carcinogenicity: Not classified as carcinogenic by IARC, NTP, OSHA
Other Relevant Data: No data for reproductive toxicity or mutagenicity; animal studies indicate low to moderate toxicity

Ecological Information

Toxicity to Aquatic Life: Toxic to aquatic organisms; may cause long-term adverse effects in the aquatic environment
Persistence and Degradability: Limited data on environmental degradation; not expected to persist under aerobic conditions
Bioaccumulation Potential: May accumulate in aquatic biota due to lipophilicity
Mobility in Soil: Likely to adsorb to soil particles
Other Adverse Effects: Release to environment should be minimized to reduce ecological risk

Disposal Considerations

Waste Treatment Methods: Dispose of in accordance with local, regional, and national regulations; do not release to sewers or surface water
Contaminated Packaging: Decontaminate containers and recycle or dispose of as hazardous waste
RCRA Status: May be classified as hazardous waste under federal regulations
Recommended Disposal: Incineration in a chemical incinerator with afterburner and scrubber, following state and federal guidelines

Transport Information

UN Number: UN1993
Proper Shipping Name: Flammable liquid, n.o.s. (contains 2-Ethyl-1-hexanethiol)
Transport Hazard Class: 3 (Flammable Liquids)
Packing Group: III
Labels: Flammable liquid
Environmental Hazards: Marine pollutant
Special Precautions: Handle and store upright, away from incompatible materials; provide adequate ventilation during transport

Regulatory Information

TSCA: Listed on US Toxic Substances Control Act Inventory
EINECS/ELINCS: Listed on European Inventory
OSHA Hazard Communication: Flammable liquid; acute toxicity; skin and eye irritant
SARA Title III: May require reporting under sections 311/312 of the Emergency Planning and Community Right-To-Know Act
California Proposition 65: Not listed
Other Regulatory Status: Product must be used, stored, and transported according to all applicable chemical safety and environmental regulations