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Product Name: N-Butylcyclopentane
Synonyms: Cyclopentane, N-butyl-, 1-Butylcyclopentane
Recommended Use: Chemical intermediate, solvent for chemical reactions, research applications
Manufacturer/Supplier: Details vary by location; always verify supplier for safety contacts and shipment details
Emergency Phone Number: Refer to your supplier or local poison control center; for U.S., CHEMTREC is commonly used
CAS Number: 871-32-7
UN Number: UN3295 (Hydrocarbons, liquid, n.o.s., including N-Butylcyclopentane)
EC Number: 212-824-5
Relevant Identified Uses: Laboratory chemicals, manufacturing processes, not for pharmaceutical or food use
Classification: Flammable liquid, irritant
GHS Label Elements: Signal word: Danger; Pictogram: Flame
Hazards: Highly flammable liquid and vapor, may cause skin and respiratory irritation, potential narcotic effects from inhalation, harmful to aquatic life
Precautionary Statements: Keep away from heat, sparks, open flames; use explosion-proof equipment; wear protective gloves, clothing, eye, face protection
Routes of Exposure: Inhalation, skin contact, eye contact, ingestion
Target Organs: Central nervous system, respiratory tract, liver, kidneys
Other Hazards: Vapor may form explosive mixtures with air, heavier than air, may accumulate in low spots
Chemical Name: N-Butylcyclopentane
CAS Number: 871-32-7
Concentration: ≥98%
Impurities: Typical hydrocarbon impurities <2%; if found, specific to batch
Molecular Formula: C9H18
Molecular Weight: 126.24 g/mol
Other Components: No additives, no known stabilizers used
Inhalation: Remove victim to fresh air, keep comfortable for breathing. If breathing issues continue, seek medical attention. For headaches, dizziness, or confusion, rest and monitor closely.
Skin Contact: Take off contaminated clothing and wash skin with soap and plenty of water. For redness or irritation, apply soothing lotion and medical attention as needed.
Eye Contact: Rinse cautiously with water for several minutes, remove contact lenses if present, and continue rinsing. If irritation persists, consult an ophthalmologist.
Ingestion: Rinse mouth with water; do not induce vomiting. Consult a healthcare provider or poison control immediately.
Self-Protection of Rescuer: Ensure surrounding air is safe before approaching. Wear gloves, avoid direct contact, and use a mask if available.
Most Important Symptoms: Drowsiness, dizziness, skin dryness, headache, nausea
Suitable Extinguishing Media: Foam, dry chemical, carbon dioxide, do not use water jet
Special Hazards: Vapors may travel to ignition sources and flash back. Combustion may produce carbon monoxide and dioxide.
Advice for Firefighters: Wear full protective equipment and self-contained breathing apparatus. Move containers from fire area if safe.
Further Information: Use water spray to cool exposed surfaces and prevent pressure build-up.
Explosion Limits: Vapors heavier than air; gather in low-lying areas, increasing explosion risk, especially in enclosed spaces
Protective Actions: Evacuate area, fight fire from protected location, stay upwind
Personal Precautions: Evacuate non-essential personnel. Ventilate area. Avoid breathing vapors and skin contact.
Environmental Precautions: Prevent spills from entering drains, soil, or waterways. Notify local environmental authorities if large amounts enter the environment.
Methods for Cleaning Up: Use non-sparking tools for containment. Absorb spill on inert material such as sand or vermiculite and collect in chemical waste containers.
Additional Measures: Secure sources of ignition, monitor for vapor accumulation, and provide adequate ventilation throughout cleanup.
Decontamination: Wash area thoroughly with water and detergent after removal of bulk material.
Disposal of Collected Material: Refer to Disposal Considerations section
Safe Handling: Ground and bond containers and equipment. Avoid inhaling vapor or mist. Prevent buildup of static electricity by using conductive containers and proper grounding. Use explosion-proof ventilation and equipment.
Avoid: Exposure to heat, sparks, flames, or hot surfaces. Do not handle in unventilated areas.
Hygiene Measures: Wash hands after use, remove contaminated clothing and wash before reuse.
Storage Conditions: Store in tightly closed, clearly labeled containers in a cool, dry, well-ventilated area away from incompatible materials. Protect from sunlight.
Incompatible Materials: Strong oxidizing agents, acids, alkalis. Prolonged exposure to air may increase hazard of peroxides.
Special Storage Requirements: Keep container upright, away from ignition sources, in qualified chemical storage areas
Exposure Limits: No specific OSHA or ACGIH TLV set; recommend keeping airborne levels below 100 ppm as general hydrocarbon guideline.
Engineering Controls: Use process enclosures, local exhaust ventilation, or other engineering controls to keep airborne levels below recommended exposure.
Personal Protective Equipment: Splash-resistant safety glasses or chemical goggles, chemical-resistant gloves such as nitrile or neoprene, flame-resistant lab coat or apron, closed footwear
Respiratory Protection: If ventilation inadequate, use an air-purifying respirator with organic vapor cartridge.
Other Protective Measures: Eye wash stations, safety showers, good industrial hygiene
Environmental Exposure Controls: Keep away from drains and open water. Monitor air and water quality if large-volume use.
Appearance: Clear, colorless liquid
Odor: Mild hydrocarbon, gasoline-like
Odor Threshold: Not established
pH: Not applicable
Melting Point/Freezing Point: Approx. -90°C
Boiling Point: 147–151°C
Flash Point: 31°C (closed cup)
Evaporation Rate: Not determined
Flammability: Highly flammable
Upper/Lower Flammability or Explosive Limits: Lower: ~1%, Upper: ~7% (estimated, as typical for alkylated hydrocarbons)
Vapor Pressure: 3–4 mmHg at 25°C
Vapor Density: Heavier than air
Relative Density: 0.78–0.80 (water=1)
Solubility: Insoluble in water, miscible with organic solvents
Partition Coefficient (n-octanol/water): Approx. 4.5 (estimated)
Auto-ignition Temperature: 230°C (approximate)
Decomposition Temperature: Not determined
Viscosity: Low, mobile liquid
Other Data: No significant color or fluorescence under normal conditions
Chemical Stability: Product remains stable in sealed containers at room temperature and away from light and air.
Reactivity: Reacts with strong oxidizing agents to generate heat and hazardous byproducts.
Conditions to Avoid: Heat, sparks, flames, contact with incompatible chemicals.
Incompatible Materials: Strong oxidizers, mineral acids, peroxides.
Hazardous Decomposition Products: Carbon monoxide, carbon dioxide, possible traces of hydrocarbons
Hazardous Polymerization: Not expected under normal storage and use
Additional Information: Prevent vapor accumulation and ignition in confined spaces; routinely inspect containers for leaks
Likely Routes of Exposure: Inhalation, skin, eyes, ingestion
Acute Toxicity: LD50 (oral, rat): >2,000 mg/kg; LD50 (dermal, rabbit): >2,000 mg/kg (estimated, structurally similar hydrocarbons)
Chronic Effects: Repeated skin exposure may cause dermatitis. Possible central nervous system effects including dizziness, drowsiness, headache.
Skin Corrosion/Irritation: Mild to moderate irritation with prolonged exposure
Serious Eye Damage/Irritation: May cause mild, transient irritation
Respiratory Sensitization: Not classified as a sensitizer; vapors can cause irritation and narcotic effects at high concentrations.
Carcinogenicity: Not classified as a carcinogen by IARC, ACGIH, NTP, or OSHA.
Mutagenicity: Not expected to be mutagenic
Reproductive Toxicity: No data available; hydrocarbons often lack notable reproductive effects but caution advised
STOT – Single/Repeated Exposure: High vapor concentrations depress central nervous system.
Other Information: Pre-existing skin or respiratory conditions may be aggravated by exposure
Ecotoxicity: Harmful to aquatic life due to low water solubility and high hydrocarbon content. LC50 (fish, 96h): estimated 1–10 mg/L.
Persistence/Degradability: Slow to degrade under environmental conditions. May persist in soil or water for extended periods.
Bioaccumulative Potential: Based on log Kow, expected to bioaccumulate in aquatic organisms.
Mobility in Soil: Low water solubility limits mobility; can adsorb to soil and sediment, raising long-term environmental impact.
Other Adverse Effects: Volatile organic compound, may contribute to ground-level ozone in photochemical smog.
Wastewater Impact: Toxic to microorganisms in sewage treatment; best managed as hazardous waste
Further Details: Avoid uncontrolled releases to the environment, consult local regulations for spill and release reporting
Waste Disposal Methods: Dispose of waste in accordance with local, state, and federal environmental regulations. Combustible liquid—incinerate in approved chemical waste facility whenever feasible.
Container Handling: Triple rinse empty containers before recycling or disposal; puncture and avoid reuse for non-chemical purposes.
Special Precautions: Avoid discharge to natural waterways, sewers, or storm drains. Notify authorities for large spills.
Regulatory Compliance: EPA waste code D001 (flammable hazard) often applies. Confirm with your hazardous waste coordinator.
UN Number: UN3295
UN Proper Shipping Name: Hydrocarbons, liquid, n.o.s. (including N-Butylcyclopentane)
Transport Hazard Class: 3 (Flammable liquids)
Packing Group: III
Environmental Hazards: Marine pollutant status may apply when shipped in bulk; confirm with shipper.
Special Precautions for Transport: Use certified safety cans. Secure tightly and keep upright throughout transit. Label packages as flammable.
Additional Transport Information: For air and international freight, comply with IATA and IMDG regulations
Worldwide Inventory Status: Listed on TSCA (U.S.), EINECS (EU), AICS (AUS), DSL (Canada), ENCS (Japan), KECI (Korea), PICCS (Philippines), IECSC (China)
SARA Title III: Not subject to reporting under Sections 302, 304, or 313
OSHA: Classified as hazardous under 29 CFR 1910.1200 (Hazard Communication Standard)
California Prop 65: Not currently listed as a cancer or reproductive toxin
REACH Info: Subject to registration requirements for use in the European Union
Other National Information: Check national and local guidelines before use or disposal. Local workplace safety and environmental agencies may assign additional controls
Label Requirements: GHS-compliant labeling mandatory: flammable, health hazard, environmental warning
