Product Name: Cyclohexane
Synonyms: Hexahydrobenzene, Hexamethylene Cyclohexyl hydride
Chemical Formula: C6H12
CAS Number: 110-82-7
Recommended Use: Solvent, intermediate in nylon production, paint remover
Supplier/Manufacturer: Provided upon request to your specific source
Contact Details: Emergency phone numbers, supplier address, 24/7 incident response number
Hazard Classifications: Flammable liquid (Category 2), Aspiration hazard (Category 1), Specific target organ toxicity – single exposure (Category 3), Acute aquatic toxicity (Category 1)
Pictograms: Flame, Health hazard, Exclamation mark, Environment
Signal Word: Danger
Hazard Statements: Highly flammable liquid and vapor. May cause drowsiness or dizziness. Toxic to aquatic life with long lasting effects. May be fatal if swallowed and enters airways.
Precautionary Statements: Keep away from heat, sparks, open flames. Avoid breathing vapors. Use explosion-proof equipment. Prevent release to environment. Wear protective gloves, eye protection.
Chemical Name: Cyclohexane
Concentration (%): 99% or higher by weight
Impurities: May contain trace aromatics, n-hexane below threshold
Additives: Not intentionally added
Other Ingredients: None reported
Inhalation: Move person to fresh air. Seek medical advice if symptoms (headache, dizziness, nausea) develop.
Skin Contact: Remove contaminated clothing. Wash affected area with water and soap for several minutes. Get medical help for persistent irritation.
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present and easy. Continue rinsing. Obtain medical advice if irritation persists.
Ingestion: Do not induce vomiting. Never give anything by mouth to an unconscious person. Obtain immediate medical attention due to risk of aspiration.
Suitable Extinguishing Media: Carbon dioxide, dry chemical, foam, water spray (fog-type).
Unsuitable Media: Do not use water jet.
Specific Hazards: Gives off hazardous gases (carbon monoxide, carbon dioxide) on burning or decomposition. Vapors may form explosive mixtures with air.
Protective Equipment for Firefighters: Full firefighting turn-out gear, self-contained breathing apparatus.
Special Instructions: Cool fire-exposed containers with water spray. Stay upwind. Evacuate area if needed.
Personal Precautions: Eliminate all ignition sources. Evacuate unnecessary personnel. Ventilate area.
Environmental Precautions: Prevent material from reaching drains, sewers, and waterways.
Cleanup Methods: Absorb spill with inert material (sand, earth, vermiculite). Transfer to labeled containers for disposal.
Prevention of Secondary Hazards: Remove contaminated surfaces and materials. Wash spill site with water after material pick-up.
Handling: Avoid inhaling vapor or mist. Use only in well-ventilated areas. Keep away from ignition sources. Prevent static discharge.
Storage: Store in tightly closed containers in cool, dry, well-ventilated spaces away from direct sunlight, heat, and oxidizers. Ground storage containers. Keep away from food and feed.
Conditions to Avoid: Exposure to heat, sparks, open flame
Occupational Exposure Limits: OSHA PEL: 300 ppm (1050 mg/m³), ACGIH TLV: 100 ppm (350 mg/m³)
Engineering Controls: Local exhaust ventilation, fume hoods, explosion-proof equipment.
Personal Protection: Chemical-resistant gloves (nitrile, neoprene), safety goggles, flame-retardant clothing, safety shoes.
Respiratory Protection: Use NIOSH-approved organic vapor respirator if exposure limits are likely to be exceeded.
Hygiene Measures: Wash hands thoroughly after handling. Remove contaminated clothing before eating or drinking.
Appearance: Colorless, clear liquid
Odor: Mild detergent or sweet, gasoline-like odor
Odor Threshold: Approximately 25 ppm
Melting Point: 6.5°C (43.7°F)
Boiling Point: 80.7°C (177.3°F)
Flash Point: -18°C (0°F, closed cup)
Evaporation Rate: 2.9 (n-Butyl acetate = 1)
Flammability: Extremely flammable liquid and vapor
Vapor Pressure: 97 mmHg at 25°C
Vapor Density: 2.97 (air = 1)
Relative Density: 0.778 (water = 1)
Solubility: Insoluble in water; miscible with most organic solvents
Partition Coefficient (log Kow): 3.44
Auto-ignition Temperature: 245°C (473°F)
Decomposition Temperature: Not determined
Viscosity: 1.02 cP at 25°C
Chemical Stability: Stable under recommended storage conditions.
Possibility of Hazardous Reactions: Can undergo violent polymerization or oxidation in presence of strong acids, bases, oxidizers.
Conditions to Avoid: Heat, flames, electrostatic discharge, incompatible materials.
Incompatible Materials: Strong oxidizing agents (nitric acid, peroxides), halogens.
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, various hydrocarbons
Routes of Exposure: Inhalation, skin absorption, ingestion, eye contact
Acute Effects: Headache, dizziness, nausea, central nervous system depression, skin and eye irritation
Chronic Effects: Long-term repeated inhalation exposure may affect nervous system and liver
Acute Toxicity (LD50/LC50): Oral rat LD50: 12705 mg/kg; Dermal rabbit LD50: >2000 mg/kg; Inhalation rat LC50 (4h): 13,400 ppm
Carcinogenicity: Not listed by IARC, NTP, OSHA
Mutagenicity/Teratogenicity: No strong evidence in animal or in vitro studies
Target Organ Effects: Central nervous system, liver
Other Relevant Symptoms: May cause respiratory tract irritation, drowsiness or dizziness
Ecotoxicity: Toxic to aquatic organisms. May cause long-term adverse effects in aquatic environment.
Aquatic Toxicity: Fish (Pimephales promelas) LC50 (96 h): 4.53 mg/L; Daphnia EC50: 0.9 mg/L
Persistence/Degradability: Readily biodegradable under aerobic conditions
Bioaccumulation Potential: Moderate, log Kow of 3.44 indicates potential for bioconcentration
Mobility in Soil: Low water solubility leads to adsorption to soil, possible groundwater contamination
Waste Disposal Methods: Incinerate in a permitted facility or treat by licensed chemical waste contractors. Do not pour into drains or watercourses.
Container Disposal: Clean empty containers with water and solvent, puncture, and send for recycling or disposal by approved handlers.
Special Precautions: Comply with all local, regional, national, and international regulations on hazardous waste management for flammable organics.
UN Number: UN1145
Proper Shipping Name: Cyclohexane
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: II
Labels Required: Flammable Liquid
Environmental Hazards: Marine pollutant
Special Transport Precautions: Keep containers tightly closed, upright, and away from sources of ignition in transit. Follow ICAO/IATA, IMDG, and ADR/RID regulations.
OSHA Status: Hazardous by definition under Hazard Communication Standard (29 CFR 1910.1200)
SARA Title III: Section 302: Not listed. Section 313: Subject to reporting.
TSCA Inventory: Listed
California Proposition 65: Not listed as a carcinogen or reproductive toxicant
Other Regulatory Approval: Listed in Europe (EINECS), Canada (DSL), Australia (AICS), and other major national inventories. Subject to workplace exposure limits, discharge regulations, and environmental release controls wherever handled or transported.
