Basic Identification of n-Pentane 99% CAS 109-66-0

English name: n-Pentane

CAS No.: 109-66-0

Molecular formula: C5H12

Molecular weight: 72.15

EINECS：203-692-4

UN No.: 1265; Dangerous Goods Code: 31002 (Class 3 Highly Flammable Liquids)

Physical and Chemical Properties

Appearance and Odor: Colorless, transparent liquid with a faint minty odor.

Melting point: −129.8 °C

Boiling point: 36.1 °C (highly volatile, producing large amounts of vapor at room temperature).

Density: 0.626 g/mL (25 °C, less dense than water).

Closed-cup flash point: −49 ℃; Ignition temperature approximately 260 ℃.

Explosive limit (volume fraction): 1.4%～8.0%, vapor readily forms explosive mixtures.

Solubility: Slightly soluble in water; miscible with organic solvents such as ethanol, ether, acetone, benzene, and chloroform.

Specifications

Appearance                                   Clear colorless Liquid

Normal pentane Wt                        99%min

Hexane and heavier Wt                   0.5%max

Butane and lighter Wt                     0.5%max

Total Sulfur                                    1ppm max

Bromine Index mgBr/100g              150max

Specific Gravity g/cm3                    0.60-0.65

Main Uses

- Organic solvents, extraction solvents, and chromatographic solvents;

- Polyurethane, EPS foam plastic foaming agent (Freon environmentally friendly alternative);  

- Desorbent for molecular sieve dewaxing process;

- Organic synthesis raw materials, cryogenic working fluids;

- Gasoline blending components, aerosol propellants.

Safety Hazards

Highly flammable liquids and vapors, keep away from open flames, static electricity, and heat sources; vapors can spread over long distances and may reignite and explode upon encountering a fire source;

Inhalation hazards: High-concentration vapors have anesthetic effects, causing dizziness, nausea, and confusion;

Swallowing risk:

Toxic to aquatic organisms, must not be discharged into the environment indiscriminately;

Prohibited substances: Strong oxidizers (potassium permanganate, peroxides, etc.), which may cause violent reactions.

Key Points for Storage and Transportation  

Store in a sealed, cool, and well-ventilated warehouse; maintain low-temperature storage.  Ensure containers are anti-static and grounded.  Strictly prohibit storage with oxidizers.  Use explosion-proof electrical equipment.

Packing

12-14mt/ISO Tank