Cyclopentane

Cyclopentane is a colorless, transparent, and highly mobile liquid that is insoluble in water but miscible with ethanol, diethyl ether, acetone, hydrocarbons, and most organic solvents; it dissolves fats, oils, rubber, and certain resins. It possesses a mild, hydrocarbon-like odor resembling gasoline and is the simplest saturated five-membered cycloalkane. It can undergo ring-opening oxidation to form products such as glutaric acid in the presence of strong oxidizing agents, and can undergo catalytic ring-opening at high temperatures to yield low-carbon olefins.

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Product Introduction

Zouping Jinxing Chemical Co., Ltd. is one of the leading manufacturers and suppliers of cyclopentane in China. If you're going to wholesale bulk cyclopentane made in China, welcome to get free sample from our factory. All customized products are with high quality and low price.

Basic physical properties

CAS: 287-92-3
Boiling point: 49.3 °C
Melting point: -94.4 °C
Density: 0.751 g/cm³ (at 20 °C); much lighter than water
Refractive index: n²⁰ᴅ ≈ 1.406
Solubility: Insoluble in water; miscible with ethanol, diethyl ether, acetone, hydrocarbons, and most organic solvents; dissolves fats, oils, rubber, and some resins
Flash point: -37 °C (closed cup); extremely flammable liquid (GHS Category 1), more hazardous than methyl acetate
Vapor pressure: Approx. 44 kPa at 20 °C; highly volatile
Explosion limits: 1.1%–8.7% v/v; vapor is heavier than air and spreads along the ground, posing a risk of flashback
ODP: 0 (zero ozone depletion potential); very low GWP; this is its key advantage as a substitute for Freon

Primary Uses

Blowing agent: Substitute for HCFC-141b in rigid polyurethane foam (for refrigerators and freezers); still widely used today.
Solvent: Solvent for rubber, oils, fats, waxes, and resins (low-to-medium polarity).
Organic synthesis: Production of cyclopentanone, glutaric acid, and intermediates for pharmaceuticals and pesticides.
Refrigerant component: Early research focused on alternatives to the R-500 series; now largely replaced by isobutane/cyclopentane blends.

Safety and Physiology

Toxicity: Low toxicity but strongly anesthetic. Oral LD₅₀ in rats ≈ 3.5 g/kg; high vapor concentrations cause dizziness, nausea, and confusion; liquid form causes skin irritation due to defatting.
GHS: H224 Extremely flammable liquid; H304 Harmful if inhaled; H336 Neurological symptoms.
Storage and Transport: UN 1146, Class 3, PG I; store in an explosion-proof facility (≤25°C), keep away from ignition sources, ensure anti-static grounding, and strictly prohibit mixed storage with oxidizing agents.

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