Name

Benzene

CAS：

71-43-2

Synonymous

Phene

Chinese name

苯

Molecular formula

C6H6

Molecular weight

78.11

Melting point

5.5℃

Boiling point

80.1℃

Flash point

-11℃

Density

0.88

Solubility

Insoluble in water, soluble in alcohol, ether, acetone and other organic solvents

Stable explosion limit

1.3%-7.1%

Appearance

Colorless transparent liquid with strong aromatic aroma

Danger marking

3.2

Item

Index

Experimental method

Petroleum Benzene-535

Petroleum Benzene-545

Appearance

Transparent liquid, no insoluble water and mechanical impurities

Transparent liquid, no insoluble water and mechanical impurities

Visual inspection

Color (platinum cobalt number) not darker than

20

20

GB/T 3143                 

Purity (mass fraction) /% not less than

99.80

99.90

ASTMD 4492             

Toluene (mass fraction) /% not more than

0.10

0.05

ASTMD 4492            

Non aromatic hydrocarbon (mass fraction) /% not more than

0.15

0.10

ASTMD 4492               

Thiophene / (mg / kg) not more than

-

0.6

ASTMD 4735             

Pickling colorimetry

The color of the acid layer is not deeper than 1000ml, and the dilute acid contains 0.20g standard solution of potassium dichromate

The color of the acid layer is not deeper than 1000ml, and the dilute acid contains 0.10g standard solution of potassium dichromate

GB/T 2012 

Total sulfur content / (mg / kg) not more than

2

1

SH/T 0253                     

Bromine index / (mg / 100 g) not more than

-

20

SH/T 1551              

Crystallization point (dry basis) / ℃ not less than

5.35

5.45

GB/T 3145