Product Name: Cyclopentane
Chemical Formula: C5H10
CAS Number: 287-92-3
Synonyms: n-Pentamethylene, RC-75
Molecular Weight: 70.13 g/mol
Recommended Use: Used as a blowing agent for polyurethane foams, in chemical synthesis, and as a laboratory solvent.
Manufacturer/Supplier: Named supplier or chemical provider, with address and emergency phone contact.
Restrictions: Not for pharmaceutical, food, or household applications.
Classification: Flammable liquid (Category 2, H225), Acute toxicity – oral (Category 4, H302), Specific target organ toxicity – single exposure (Category 3, H336)
GHS Label Elements: Signal Word: Danger, Hazard Statements: Highly flammable liquid and vapor, Harmful if swallowed, May cause drowsiness or dizziness.
Pictogram: Flame, Exclamation mark.
Routes of Exposure: Inhalation, skin absorption, ingestion, eye contact.
Health Hazards: Can irritate skin and eyes, narcotic effects through inhalation, possible central nervous system depression, headache, dizziness.
Environmental Hazards: Toxic to aquatic life with long lasting effects.
Other Hazards: Vapors may cause flash fire.
Cyclopentane: 97–100%
Impurities: Typical trace hydrocarbons (may include cyclohexane, methylcyclopentane)
Unique Identifiers: EC No. 206-016-6
Stabilizers/Additives: Usually not included unless specifically formulated.
Inhalation: Remove the person to fresh air, seek medical attention if symptoms like dizziness, drowsiness, or headaches appear. Give oxygen if breathing is difficult.
Skin Contact: Remove contaminated clothing, wash skin thoroughly with soap and water, consult a doctor if irritation develops.
Eye Contact: Rinse with lukewarm water for several minutes, do not rub eyes, seek medical attention if irritation persists.
Ingestion: Do not induce vomiting, rinse mouth with water if conscious, immediately call poison control center or doctor.
Medical Attention: Treat symptomatically, monitor for respiratory complications.
Suitable Extinguishing Media: Alcohol-resistant foam, carbon dioxide, dry chemical powder, do not use water stream directly on burning material.
Specific Hazards: Vapors may form explosive mixtures with air, containers may explode if heated, combustion generates carbon monoxide, carbon dioxide.
Special Protective Equipment: Self-contained breathing apparatus, chemical protective suit.
Firefighting Instructions: Evacuate area, fight fire from safe distance, cool exposed containers with spray, prevent firewater from entering drains.
Flash Point: -37°C (-34.6°F).
Personal Precautions: Evacuate all non-essential personnel, ventilate area, eliminate all ignition sources, use protective gloves and goggles.
Environmental Precautions: Prevent entry into sewers and waterways, contain run-off with sand or earth.
Cleanup Methods: Absorb with non-combustible material like sand, collect in labeled containers for disposal, ventilate and wash spill site after material pickup.
Reporting: Notify authorities if spill enters environment or violates regulatory thresholds.
Precautions for Safe Handling: Use only in well-ventilated areas, ground and bond containers during transfer, avoid breathing vapors, keep away from heat, sparks, flame.
Safe Storage Conditions: Store in tightly closed, properly labeled containers, segregate from oxidizers, acids; store in cool (below 25°C), dry, well-ventilated place.
Storage Class: Flammable liquids storage.
Incompatible Materials: Strong oxidizing agents, halogens.
Avoid: Static discharge, contamination, and prolonged exposure to air.
Exposure Limits: OSHA PEL 600 ppm (1720 mg/m3) TWA, ACGIH TLV 600 ppm (1720 mg/m3) TWA
Engineering Controls: Local exhaust ventilation, fume hoods, explosion-proof equipment.
Personal Protection: Protective gloves (nitrile recommended), safety goggles or face shield, flame-resistant clothing, organic vapor respirator if engineering controls inadequate.
Hygiene Measures: Wash hands after handling, do not eat, drink, or smoke during use, remove contaminated clothing and wash before reuse.
Appearance: Clear, colorless liquid
Odor: Mild petrol-like
Odor Threshold: 20 ppm
pH: Not applicable
Melting Point/Range: -94°C (-137°F)
Boiling Point/Range: 49°C (120.2°F)
Flash Point: -37°C (-34.6°F)
Evaporation Rate: Fast
Flammability: Highly flammable liquid and vapor
Vapor Pressure: 345 hPa at 20°C
Vapor Density: 2.41 (air = 1)
Relative Density: 0.746 (water = 1) at 20°C
Solubility: Practically insoluble in water; soluble in organic solvents
Partition Coefficient n-octanol/water: 3.45
Autoignition Temperature: 361°C (682°F)
Decomposition Temperature: Not established
Viscosity: ~0.39 mPa·s at 20°C
Chemical Stability: Stable under recommended storage conditions.
Possibility of Hazardous Reactions: Risk of explosive vapor/air mixture formation above flash point, reacts exothermically with oxidizing agents.
Conditions to Avoid: Heat, flame, sparks, electrostatic discharge, contact with incompatible materials.
Incompatible Materials: Strong oxidizers, nitric acid, halogens.
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, irritating smoke and fumes.
Acute Toxicity: LD50 oral (rat) ≥ 5000 mg/kg, LC50 inhalation (rat, 4 h) ≥ 25,000 mg/m3
Skin Corrosion/Irritation: May cause mild irritation on prolonged contact.
Eye Damage/Irritation: Vapors and liquid cause irritation.
Respiratory/Skin Sensitization: Not known to cause sensitization.
Germ Cell Mutagenicity: No data available showing mutagenic effects.
Carcinogenicity: Not classified as carcinogenic (IARC, NTP, OSHA).
Reproductive Toxicity: Data not sufficient for effect.
STOT-Single Exposure: May cause drowsiness or dizziness.
STOT-Repeated Exposure: Not classified.
Aspiration Hazard: May cause lung damage if aspirated.
Ecotoxicity: Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Persistence and Degradability: Readily biodegradable in aerobic conditions.
Bioaccumulative Potential: Moderate potential based on log Kow value.
Mobility in Soil: Low to moderate mobility, may evaporate to atmosphere from soil.
Other Adverse Effects: Not expected to contribute to ozone depletion or global warming in significant amounts.
Waste Disposal Methods: Dispose via licensed chemical waste incinerator, do not release into sewers or surface waters.
Contaminated Packaging: Rinse thoroughly, offer for recycling if possible or dispose as hazardous waste.
Regulations: Follow local, federal, and national regulations on chemical waste disposal.
Advice: Avoid landfilling whenever possible, consider solvent reclamation for large quantities.
UN Number: UN 1146
UN Proper Shipping Name: Cyclopentane
Transport Hazard Class: 3 (Flammable liquids)
Packing Group: II
Labels Required: Flammable liquid (Class 3)
Marine Pollutant: No
Environmental Hazards: See Ecological section for aquatic safety considerations.
Special Precautions for Transport: Secure containers, do not transport with food, avoid sources of ignition, ensure ventilation in transport vehicles, adhere to local and international regulations like IMDG, IATA, ADR.
US TSCA: Listed
EU REACH: Registered substance
OSHA HazCom: Classified as hazardous
SARA Title III: Listed, subject to reporting under Sections 311/312 (hazard: fire, acute health)
WHMIS (Canada): B2 (flammable liquid), D2B (toxic material causing other effects)
Labeling Requirements: GHS-compliant labels with hazard and precautionary statements.
Other Regulations: Compliance with local, state, and national chemical safety regulations, including storage, transport, and environmental discharge limits.
