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Chemical Name: 1,1,3,3-Tetramethyl-1-Butanethiol
Other Names: Tert-butylthiol, 2,2,4,4-Tetramethyl-3-thiolpentane
CAS Number: 594-42-3
Recommended Use: Chemical intermediate, odorant in natural gas detection, laboratory reagent
Supplier: Listed manufacturer or distributor details required
Emergency Contact: Local Poison Control Center or supplier’s emergency line
Classification: Flammable liquid (Category 3), Acute toxicity oral/inhalation (Category 4), Skin and eye irritation (Category 2/2A), Aquatic toxicity (Category 2)
GHS Label Elements: Pictograms for flammable, toxic, irritant, and hazardous to environment
Signal Word: Warning
Hazard Statements: Causes skin and eye irritation, may cause respiratory irritation, flammable liquid and vapor, harmful if swallowed or inhaled, toxic to aquatic life
Precautionary Statements: Avoid breathing fumes or vapors, keep away from heat or spark sources, wear protective gloves, wash skin thoroughly after handling, avoid release to environment
Substance: Pure chemical
Chemical Formula: C8H18S
Concentration: 99%
Impurities: Minor secondary components may include unreacted hydrocarbons or thiol derivatives below 1%
Synonyms: 1,1,3,3-Tetramethylbutyl mercaptan
Molecular Weight: 146.30 g/mol
Inhalation: Move the person to fresh air, support breathing, seek immediate medical attention if symptoms like coughing, headache, dizziness, or nausea develop
Skin Contact: Remove contaminated clothing, rinse skin with copious amounts of water and soap, seek medical advice for continued irritation
Eye Contact: Flush eyes with lukewarm running water for a minimum of fifteen minutes, lift upper and lower eyelids, remove contact lenses
Ingestion: Rinse mouth carefully, do not induce vomiting, seek prompt medical attention
General: Provide safety data to medical personnel, watch for delayed symptoms, ensure patient comfort, monitor for allergic reaction or chemical pneumonia
Suitable Extinguishing Media: Dry chemical powder, foam, carbon dioxide, do not use water directly on liquid, but use water for cooling containers
Special Hazards: Emits toxic sulfur oxides, flammable vapors may cause explosive mixtures with air, containers exposed to fire may explode
Protective Equipment: Self-contained breathing apparatus, full protective gear, avoid inhalation of combustion products
Specific Methods: Approach fire from upwind, isolate hazard area, use non-sparking tools, cool containers with water spray
Advice for Firefighters: Stay alert for flashback, protect surroundings, evacuate area if risk of explosion exists
Personal Precautions: Evacuate area, ensure adequate ventilation, avoid breathing vapors, wear full protective clothing, do not touch spilled material
Environmental Precautions: Prevent entry into drains or surface waters, contain spread with sand or earth
Clean-up Methods: Absorb with non-combustible materials, place in appropriate chemical waste containers, ventilate area, decontaminate surfaces
Decontamination: Use soap and water solution on site, rinse area thoroughly
Disposal: Dispose contaminated material in accordance with local and national regulations
Handling: Use in well-ventilated chemical fume hood, avoid contact with skin and eyes, avoid inhalation, wear personal protective equipment, keep away from ignition sources
Storage: Store in tightly closed containers, in cool dry place, away from heat, sparks, open flame, and incompatible substances such as oxidizers and acids
Technical Measures: Use explosion-proof electrical equipment, bond and ground containers, use non-sparking tools
Other Precautions: Keep out of reach of children, store away from food products, label clearly
Exposure Limits: ACGIH TLV not established specifically; handle as hazardous substance, use lowest feasible exposure
Engineering Controls: Use local exhaust, fume hoods, general ventilation systems
Personal Protection: Chemical splash goggles, face shield, impervious gloves (nitrile or neoprene), flame-resistant lab coat, closed footwear
Respiratory Protection: Use NIOSH approved respirator for organic vapors if ventilation inadequate
Monitoring: Continuous air monitoring for vapor in confined areas recommended
Appearance: Clear, colorless to pale yellow liquid
Odor: Strong skunky, offensive odor
Odor Threshold: Detectable at extremely low concentrations
pH: Not applicable (non-aqueous)
Melting Point/Freezing Point: Below -30°C
Boiling Point: Approximately 158°C
Flash Point: 44°C (closed cup)
Evaporation Rate: Moderate
Flammability: Flammable liquid
Explosion Limits: Upper—6.6%; Lower—1.1% (estimated)
Vapor Pressure: 3.5 mmHg at 20°C
Vapor Density: 5 (air = 1)
Relative Density: 0.86 (20°C)
Solubility: Insoluble in water, soluble in organic solvents
Partition Coefficient (n-octanol/water): Data not available
Autoignition Temperature: Estimated 250°C
Decomposition Temperature: No specific data
Viscosity: Low (mobile liquid)
Chemical Stability: Stable under normal temperature and pressure
Reactivity: Reacts violently with strong oxidizing agents such as nitric acid, peroxides
Hazardous Reactions: Risk of exothermic reaction or fire when in contact with acids or oxidizers
Decomposition Products: Sulfur oxides, hydrocarbons, irritating fumes
Conditions to Avoid: Heat, open flame, spark, incompatible chemicals
Polymerization: Will not occur under recommended conditions
Likely Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Acute Effects: Eye and skin irritation, respiratory tract irritation, narcotic effects such as headache, dizziness, nausea
Oral Toxicity (LD50): Data unavailable; similar organothiols LD50 rat: 300–1000 mg/kg
Inhalation Toxicity: Data lacking, but expect symptoms at low concentrations
Skin/Eye Corrosion: Causes irritation, possible burns with extended contact
Chronic Effects: Prolonged exposure can lead to dermatitis, sensitization, chronic respiratory issues
Carcinogenicity: Not listed by IARC, NTP, OSHA
Other Information: No reproductive or mutagenic data found
Ecotoxicity: Toxic to aquatic life, significant risk to fish and invertebrates at low concentrations
Persistence and Degradability: Expected to degrade slowly in aerobic conditions, volatile to atmosphere
Bioaccumulation: Low-moderate potential, depends on environmental conditions
Mobility in Soil: May migrate in soil and contaminate groundwater, especially in sandy soils
Other Adverse Effects: Highly malodorous, strong potential for nuisance odors, significant environmental persistence in air
Waste Treatment Methods: Incineration by licensed chemical disposal provider, avoid landfill or sewage release
Container Disposal: Triple rinse empty containers, puncture and send to hazardous waste facility
Precautions: Do not dispose in regular waste, prevent environmental release, follow national and regional chemical waste rules
Other Measures: Double-bag solid waste, transport as hazardous, document all disposals for regulatory purposes
UN Number: 1993
Proper Shipping Name: Flammable Liquid, N.O.S. (contains 1,1,3,3-Tetramethyl-1-Butanethiol)
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: III
Label: Flammable Liquid
Environmental Hazards: Marine pollutant
Special Precautions for User: Package in DOT/UN approved containers, use secondary containment, ensure accompanying documentation, inform carrier of hazards
OSHA: Considered hazardous, subject to workplace chemical standards
TSCA Inventory: Listed
SARA Title III: Subject to reporting under Sections 311/312 for acute health and fire hazard
RCRA: Considered hazardous waste when discarded
State Regulations: Many states regulate as toxic air contaminant, enforce spill reporting
Other Regulation: Must comply with local, state, and federal environmental and safety rules, ensure up-to-date safety training for personnel
International: Classified as dangerous good for sea, air, and rail transport
