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1、 Product overview
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 |
2、 Quality index
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 |
3、 Purpose:
It is used as solvent and basic raw material for the synthesis of benzene derivatives, spices, dyes, plastics, medicine, explosives and rubber.
4、 Precautions
Benzene is a flammable and explosive organic substance, which is prone to explosion and fire in case of open fire. When benzene burns, it emits strong black smoke with pungent smell. Because benzene vapor is heavier than air, the flame will burn along the ground. Benzene leaks and has pungent smell, so pay attention to protection.
Manufacturing
