Pure Benzene
Product name: Benzene
Alias: Benzene Oil; Benzene; Pure Benzene; Purified Benzene; Purified Benzene; Sleeping Benzene; Solvent Benzene
CAS RN: 71-43-2;174973-66-1;54682-86-9
EINECS No.: 200-753-7
Molecular formula: C6H6
Molecular weight: 78.11
Physicochemical properties
Melting point: 5.51℃
Boiling point: 80.1℃
Liquid density (20℃): 879.4kg/m3
Gas density: 2.770kg/m3
Relative density (38℃, air=1): 1.4
Heat of vaporization (25℃): 443.62kJ/kg
(80.1℃): 394.02kJ/kg
Critical temperature: 288.94℃
Critical pressure: 4898kPa
Critical density: 302kg/m3
Specific heat capacity (gas, 90℃, 101.325kPa): Cp=1361.96kJ/(kg．K) Cv=1238.07kJ/ (kg.K)
(Liquid, 5℃): 1628.665kJ/(kg.K)
(Liquid, 20℃): 1699.841kJ/(kg.K)
Specific Heat Ratio: (Gas, 90℃, 101.325kPa): Cp /Cv=1.10
Vapor pressure (26.1℃) : 13.33kPa
Viscosity (20℃): 0.647mPa. s
Surface tension (contact with air, 0℃): 31.6mN/m
Thermal conductivity (12℃, liquid): 0.13942W/(m．K)
(0℃, liquid,): 0.0087671W/(m．K)
Refractive index (20℃): nD=14462
Flash point: -11℃
Ignition point: 562.2℃
Explosion limit: 1.3%-7.1%
Maximum explosion pressure: 9kg/ cm2
Concentration of maximum explosion pressure: 3.9%
Most flammable concentration: 5%
Combustion heat (liquid, 25°C): 3269.7KJ/mol
Toxicity Grade: 2
Flammable Grade: 3
Explosive Grade: 0
Benzene is a colorless and transparent volatile liquid with aromatic odor under normal temperature and pressure. Can emit toxic vapors. Benzene is a compound that is not easily decomposed. When it reacts with other chemical substances, its basic structure remains unchanged, except that the hydrogen atom in the benzene ring is replaced by other groups. Benzene vapors can form explosive mixtures with air. Liquid benzene is lighter than water, but its vapor is heavier than air. It is very easy to burn and explode when exposed to high heat or open flame. Benzene vapor can spread very far, ignite when it encounters a fire source, and can lead the flame back along the airflow. Benzene tends to generate and accumulate static electricity. Benzene reacts violently in contact with oxidants. Benzene is insoluble in water, but easily soluble in alcohol, ether, acetone, chloroform, gasoline, carbon disulfide and other organic solvents.
Uses: Basic chemical raw materials, used as solvents and synthetic benzene derivatives, spices, dyes, plastics, medicines, explosives, rubber, etc.
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