What Is Benzene?

Benzene (CH) is a kind of hydrocarbon which is the simplest aromatic hydrocarbon. It is a sweet, flammable, colorless and transparent liquid with carcinogenic toxicity at normal temperature, and has a strong aromatic odor. It is hardly soluble in water, easily soluble in organic solvents, and itself can be used as an organic solvent. The ring system of benzene is called benzene ring. The structure of benzene ring after removing a hydrogen atom is called phenyl, which is represented by Ph, so the chemical formula of benzene can also be written as PhH. Benzene is a basic petrochemical raw material, and its output and production technology level are one of the signs of a country's petrochemical development level.

Benzene (CH) is the simplest hydrocarbon

Benzene is a colorless, sweet, transparent liquid at room temperature. Its density is less than that of water, and it has a strong aromatic odor. Benzene has a boiling point of 80.1 ° C and a melting point of 5.5 ° C. Benzene has a lower density than water, with a density of 0.88g / cm ³ , but its

Benzene participation

Benzene can be obtained from incomplete combustion of substances with high carbon content. In nature, volcanic eruptions and forest fires can generate benzene. Benzene is also present in the smoke of cigarettes.

As early as the 1920s, benzene has been a commonly used solvent in the industry, mainly for metal degreasing. Due to the toxicity of benzene, the production process in which the human body can directly contact the solvent no longer uses benzene as a solvent.

Benzene has the effect of reducing knock and can be used as a gasoline additive. In the 1950s

LD50: 3306mg / kg (rat oral); 48mg / kg (mouse percutaneous)

LC50: 10000ppm for 7 hours (rat inhalation)

As each person's health and exposure conditions are different, their sensitivity to benzene is also different. Smell benzene when it's

Note on benzene operation

Note: Closed operation, strengthen ventilation.

Operators must be specially trained and strictly abide by the operating procedures. It is recommended that operators wear self-absorbent filter-type gas masks (half-masks), chemical safety protective glasses, anti-poison infiltration work clothes, and rubber oil-resistant gloves.

Away from fire and heat sources, smoking is strictly prohibited in the workplace.

Use explosion-proof ventilation systems and equipment.

Prevent vapors from leaking into the workplace air.

Avoid contact with oxidants. When filling, the flow rate should be controlled, and there should be a grounding device to prevent static electricity accumulation. Handle with care when handling to prevent damage to packaging and containers.

Equipped with the corresponding variety and quantity of fire fighting equipment and leakage emergency treatment equipment.

Empty containers may be harmful residues.

Benzene storage note

Note: Store in a cool, ventilated warehouse. Keep away from fire and heat sources. The storage temperature should not exceed 30 .

Keep container tightly closed. It should be stored separately from oxidants and edible chemicals.

Use explosion-proof lighting and ventilation facilities.

Prohibit the use of spark-prone machinery and tools.

The storage area should be equipped with spill emergency treatment equipment and suitable containment materials.