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Product Name: 1-Pentanethiol
Chemical Name: 1-Pentanethiol
Synonyms: n-Pentyl mercaptan, Pentanethiol
CAS Number: 110-66-7
Molecular Formula: C5H12S
Recommended Use: Laboratory chemicals, research, and chemical manufacturing
Manufacturer: Chemical supply company sourcing organosulfur compounds
Contact Information: Emergency phone number provided by supplier, technical support lines for incident questions
Emergency Overview: Clear, colorless to pale yellow liquid with strong foul odor resembling rotten cabbage
GHS Classification: Flammable liquid, Acute toxicity (oral, dermal, inhalation), Skin and eye irritant, Environmental hazard
Signal Word: Danger
Hazard Statements: May cause respiratory tract irritation, harmful if swallowed, causes skin irritation, may affect central nervous system, highly flammable liquid and vapor
Pictograms: Flame, exclamation mark, health hazard, environment
Precautionary Statements: Keep away from heat, sparks, open flames, avoid inhaling vapor, prevent contact with skin and eyes, wear protective gear, use only with adequate ventilation
Routes of Exposure: Inhalation, skin, eye, ingestion
Target Organs: Eyes, skin, respiratory tract, nervous system
Symptoms: Headache, dizziness, nausea, skin redness, eye watering or burning, irritant cough
Chemical Name: 1-Pentanethiol
CAS Number: 110-66-7
Concentration: 98-100% pure substance
Impurities & Stabilizing Additives: Low-level byproducts possible from manufacturing, no major stabilizers
Inhalation: Move person to fresh air, keep breathing unobstructed, seek medical attention if symptoms like shortness of breath or dizziness persist
Skin Contact: Wash thoroughly with soap and water, remove contaminated clothing, immediate medical care for serious burns or if irritation continues
Eye Contact: Rinse cautiously with water for several minutes, lift eyelids occasionally, contact ophthalmologist promptly for persistent irritation
Ingestion: Rinse mouth, avoid forceful vomiting, get medical help rapidly, avoid giving anything by mouth if unconscious
Self-Protection for First Aiders: Wear gloves and goggles, prevent exposure to contaminated clothing
Suitable Extinguishing Media: Dry chemical, carbon dioxide, alcohol-resistant foam
Unsuitable Extinguishing Media: Direct water stream (may spread fire)
Hazards from Combustion: Produces toxic gases including sulfur oxides and carbon monoxide
Protective Equipment for Firefighters: Full protective suit and self-contained breathing apparatus, avoid inhalation of fumes
Special Procedures: Cool containers with water spray from distance, remove containers from fire if safe, fight fire from upwind position, stop flow of material if possible without risk
Personal Precautions: Evacuate non-essential personnel, ventilate area, avoid breathing vapor, wear respirator, gloves, splash goggles, protective clothing
Environmental Precautions: Prevent spillage from entering drains, surface water or soil
Containment: Use inert non-combustible absorbent (sand, earth, vermiculite), stop leak if safe, contain spill with dikes
Cleanup Methods: Collect with non-sparking tools, transfer to labeled disposal containers, dispose according to local regulations, wash area with detergent
Reporting: Notify appropriate regulatory authorities if significant environmental release occurs
Handling: Use only in well-ventilated or fume-hood environments, avoid inhaling vapor or direct skin contact, keep away from ignition sources, ground all equipment, transfer using only spark-proof tools
Storage: Store in cool, dry, well-ventilated space, tightly closed container made of compatible materials, segregate from strong oxidizers, acids, foodstuffs, and ignition sources, install vapor detection where risk of fume build-up, use secondary containment
Special Requirements: Emergency wash stations nearby, spill response materials accessible, written procedures for transfer and disposal
Engineering Controls: Mechanical exhaust ventilation, fume hoods for laboratory use, local exhaust near storage and transfer areas
Personal Protection: Chemical-resistant gloves (nitrile, neoprene), splash-proof goggles, lab coats or chemical suits, flame-retardant clothing for industrial work, approved respirator with organic vapor cartridges for high-vapor conditions
Occupational Exposure Limits: No specific ACGIH or OSHA TLV, keep exposure as low as reasonably achievable, company-specific workplace limits may exist
Hygiene Measures: No eating, drinking, or smoking during handling, wash hands thoroughly after use, remove contaminated clothing ready for laundering, proper glove disposal after use
Appearance: Colorless to pale yellow liquid
Odor: Strong, unpleasant odor similar to rotten cabbage
Odor Threshold: Extremely low, detectable at well below hazardous concentrations
pH: Not applicable
Melting Point / Freezing Point: About -71°C
Boiling Point: About 119-120°C
Flash Point: 36°C (closed cup)
Evaporation Rate: Moderate, flammable vapor formation
Flammability: Flammable liquid and vapor, forms explosive mixtures with air
Upper / Lower Flammability or Explosive Limits: Lower limit 1.2% (v), upper limit 7.6% (v)
Vapor Pressure: 23 mmHg at 25°C
Vapor Density: Heavier than air
Density: 0.834 g/mL at 20°C
Solubility in Water: Slightly soluble, strong odor persists in aqueous solutions
Partition Coefficient (n-octanol/water): log Kow about 2.0
Auto-Ignition Temperature: 223°C
Decomposition Temperature: Data not available, decomposes with flames
Viscosity: Non-viscous liquid
Chemical Stability: Stable in typical storage conditions, avoid long-term sunlight and temperatures above flash point
Reactivity: Reacts rapidly with strong oxidizing agents, can form flammable/explosive mixtures with air
Hazardous Reactions: Violent reaction with oxidizers, strong acids, potential for polymerization under combustion
Conditions to Avoid: Heat, sparks, open flames, static discharge, high temperatures
Incompatible Materials: Oxidizers (perchlorates, nitrates), strong acids, chlorine, some metals in reactive form
Decomposition Products: Toxic gases, sulfur oxides, carbon monoxide, other organic sulfur compounds
Acute Toxicity: LD50 (oral, rat): ~150-300 mg/kg. Inhalation may cause irritation or anesthesia above exposure threshold
Skin Corrosion / Irritation: Possible irritant upon contact, persistent contact may cause chemical burns
Serious Eye Damage / Irritation: Severe irritation, redness, watering, pain possible
Respiratory or Skin Sensitization: May cause allergic dermatitis or sensitization after repeated exposure
Germ Cell Mutagenicity: Data not conclusive for mutagenic potential
Carcinogenicity: Not listed by NTP, IARC, or OSHA as a carcinogen
Reproductive Toxicity: Studies lacking for long-term reproductive impact
Specific Target Organ Toxicity (Single Exposure): Headaches, dizziness, nausea from central nervous system depression
Specific Target Organ Toxicity (Repeated Exposure): Prolonged exposure may impair liver or kidneys
Aspiration Hazard: Oil aspiration into lungs during ingestion may cause chemical pneumonia
Ecotoxicity: Toxic to aquatic life with long lasting effects, strong odor may affect aquatic oxygen exchange
Persistence and Degradability: Gradual hydrolysis and biological degradation in soils and water, full mineralization may take weeks
Bioaccumulative Potential: Moderate risk due to log Kow above 2, may concentrate in fatty tissues of aquatic species
Mobility in Soil: Moderately mobile, volatilizes quickly from moist surfaces, strongly adsorbed in soil when dry
Other Adverse Effects: Can taint drinking water even at very low concentrations, air pollution concerns due to strong odor chemicals
Waste Treatment Methods: Incinerate contents and container at licensed chemical incinerator with afterburner and scrubber, never release into natural water systems, follow state and federal chemical waste regulations
Contaminated Packaging: Rinse containers, collect rinsate for disposal as hazardous chemical, label all wastes for identity
Special Instructions: Coordination with professional waste disposal firm recommended for large-scale disposal
UN Number: UN 2347
Proper Shipping Name: Pentanethiols
Transport Hazard Class: 3 (Flammable Liquid)
Packing Group: II (Medium danger)
Environmental Hazards: Marine pollutant, notify carrier of chemical and odor risks
Special Precautions: Segregate from foodstuffs and oxidizing products during shipping, secondary containment during bulk transport
Regulatory Transport Codes: DOT, IATA, IMDG/IMO, ADR compliant
US Federal Regulations: Listed on TSCA inventory, regulated under CERCLA and SARA Title III for environmental release reporting
International Inventory Status: Registered in major chemical inventories including REACH (EU), DSL (Canada), AICS (Australia), ENCS (Japan)
Workplace Safety: OSHA Hazard Communication Standard covers this substance, Safety Data Sheets required for workplaces, PPE requirements mandated
Community Right to Know: Relevant for certain storage or use thresholds, local and state guidelines for community notification
Labeling Requirements: GHS-aligned hazard labeling, pictograms, and transport markings required
Chemical Accident Prevention: EPA Risk Management Plan threshold applies if large quantities are stored
