Product Name: Methylcyclopentane
Synonyms: Cyclopentane, methyl-; 1-Methylcyclopentane
Chemical Formula: C6H12
Molecular Weight: 84.16 g/mol
CAS Number: 96-37-7
Recommended Uses: Research laboratory, solvents, organic synthesis
Supplier Identification: Refer to supplier contact details on product label
GHS Classification: Flammable Liquids (Category 2); Specific Target Organ Toxicity – Single Exposure, Category 3; Aspiration hazard, Category 1
Signal Word: Danger
Hazard Statements: Highly flammable liquid and vapor; May be fatal if swallowed and enters airways; May cause drowsiness or dizziness
Pictograms: Flame, Health Hazard, Exclamation Mark
Precautionary Statements: Keep away from heat, sparks, open flames; Wear protective gloves, protective clothing, eye protection; Avoid breathing vapors/fumes; Use only in well-ventilated areas
Chemical Name: Methylcyclopentane
Concentration: ≥99%
CAS Number: 96-37-7
Impurities: Possible minor hydrocarbon impurities present under 1% (such as cyclopentane, methylcyclohexane)
Eye Contact: Rinse cautiously with water for several minutes; remove contact lenses if present and easy to do; continue rinsing; seek medical advice if irritation persists
Skin Contact: Wash affected skin with soap and water; remove contaminated clothing and shoes; if skin irritation occurs, get medical attention
Inhalation: Move person to fresh air; keep comfortable for breathing; if not breathing, provide artificial respiration and consult medical personnel
Ingestion: Do not induce vomiting; immediately call a poison center or doctor; if vomiting occurs, keep head low to prevent aspiration
Suitable Extinguishing Media: Dry chemical, carbon dioxide, foam; water spray for cooling containers
Specific Hazards: Extremely flammable; Vapors may form explosive mixtures with air; Containers may rupture when exposed to heat
Protective Equipment for Firefighters: Wear self-contained breathing apparatus and full protective gear; avoid inhalation of combustion products
Hazardous Combustion Products: Carbon monoxide, carbon dioxide, incomplete combustion hydrocarbons
Special Procedures: Remove containers from fire area if possible without risk; use water spray to keep fire-exposed containers cool
Personal Precautions: Evacuate area, ventilate; eliminate all sources of ignition; wear protective clothing, gloves, and goggles; avoid breathing vapors
Environmental Precautions: Prevent entry into waterways, drains, basements, or confined areas; notify relevant authorities if spill enters sewers or environment
Methods for Cleaning Up: Contain spill, absorb with inert material like sand or earth, shovel into suitable containers for disposal; wash spill site after material pickup
Reference to Other Sections: Refer to Exposure Controls/Personal Protection, Disposal Considerations
Handling: Keep away from sources of ignition—No smoking; avoid contact with eyes, skin, and clothing; use non-sparking tools; ground/bond container and receiving equipment; ensure adequate ventilation; avoid breathing vapors
Storage: Store in tightly closed, properly labeled containers in a cool, well-ventilated, flammable-proof area; keep away from heat, sparks, open flame; protect from physical damage; segregate from oxidizing agents, acids.
Occupational Exposure Limits: No official limit for methylcyclopentane; observe limits for hydrocarbons in general (consult local authority regulations)
Engineering Controls: Use local exhaust ventilation to control vapor concentrations; provide eyewash stations and safety showers
Personal Protective Equipment: Chemical-resistant gloves (nitrile, neoprene); safety goggles or face shield; flame-resistant clothing; appropriate respiratory protection if ventilation is inadequate
Physical State: Liquid
Color: Colorless
Odor: Gasoline-like or ether-like
Odor Threshold: Not available
Boiling Point: 71.6°C (160.9°F)
Melting Point: -140°C (-220°F)
Flash Point: -4°C (25°F)
Auto-Ignition Temperature: 260°C (500°F)
Explosive Limits: 1.4% (LEL) – 7.7% (UEL)
Vapor Pressure: 6.7 kPa at 20°C
Vapor Density: 2.9 (air = 1)
Specific Gravity: 0.750 (water = 1)
Solubility in Water: Insoluble
Partition Coefficient (n-octanol/water): 2.8
Viscosity: Not available
Chemical Stability: Stable under recommended storage and handling conditions
Possibility of Hazardous Reactions: Highly reactive with strong oxidizers; may react with acids and halogens
Conditions to Avoid: Exposure to heat, sparks, open flame, static discharge
Incompatible Materials: Oxidizing agents like peroxides, chromates, nitric acid; halogens; strong acids
Hazardous Decomposition Products: Thermal decomposition produces carbon monoxide, carbon dioxide, unburned hydrocarbons
Routes of Exposure: Inhalation, ingestion, skin and eye contact
Acute Toxicity: LD50 (oral, rat): >5000 mg/kg; LD50 (dermal, rat): >3000 mg/kg
Inhalation Effects: Drowsiness, dizziness, central nervous system depression, headache, nausea, unconsciousness
Skin Contact: Prolonged contact causes dryness, cracking, mild irritation
Eye Contact: Causes mild to moderate irritation, redness
Chronic Effects: Prolonged overexposure can affect liver, kidneys, may cause dermatitis
Carcinogenicity: Not listed by IARC, NTP, or OSHA as a carcinogen
Mutagenicity and Reproductive Toxicity: No data indicating mutagenic or reproductive hazards
Ecotoxicity: Toxic to aquatic organisms; may cause long-term adverse effects in the aquatic environment
Persistence and Degradability: Moderately biodegradable in water and soil; persistent in sediments
Bioaccumulation Potential: May bioaccumulate in aquatic organisms, log Kow: 2.8 indicates potential
Mobility in Soil: Low solubility in water; expected to volatilize from soil or surface waters
Other Environmental Effects: Volatile organic compound; contributes to photochemical smog
Waste Disposal Methods: Collect and contain liquid for proper disposal; incinerate in approved facility; do not drain into sewers, soil, or water bodies
Contaminated Packaging: Empty containers may retain flammable vapors; rinse and dispose according to local, state, or federal regulations
Special Precautions: Consult waste disposal provider for recommendations based on local regulations and waste classification
UN Number: UN 2296
Proper Shipping Name: Methylcyclopentane
Transport Hazard Class: 3 (Flammable liquid)
Packing Group: II
Labels and Markings: Flammable liquid symbol
Transport in Bulk: IMDG code applies for bulk transport by sea; ensure compatibility with container materials
Special Precautions for User: Keep containers upright and secure; ensure emergency response equipment is accessible; avoid transport near food or animal feed
TSCA: Listed on the US Toxic Substances Control Act inventory
OSHA: Classified as hazardous; observe OSHA flammable liquids standard
EPCRA: Not subject to Section 313 reporting
RCRA: Considered hazardous waste if discarded under code D001 (ignitable)
WHMIS Classification (Canada): B2 – Flammable liquid; D2B – toxic material
REACH (EU): Registered substance
Other National/International Regulations: Refer to country-specific regulatory lists for restrictions and reporting requirements
