Chlorobenzene

• Monochlorobenzene
• Phenylchloride
• Chlorobenzene
• MCB

Colorless liquid with an odor benzolartigem

Liquid

1.11 g · cm -3

-45.2 ° C

132 ° C

11.7 hPa ( 20 ° C)

• Very poor in water ( 0.4 g · l-1 at 20 ° C)
• Well in ethanol, diethyl ether and benzene

1.5241 (20 ° C)

Attention

1110 mg · kg -1 ( LD50, rat, oral)

Template: Infobox chemical / molecular formula search available

Chlorobenzene ( C6H5Cl, monochlorobenzene ) is an aromatic halohydrocarbon. The molecule is built up, such as benzene, any of the six hydrogen atoms of the benzene is substituted by a chlorine atom.

Properties

Chlorobenzene is highly flammable, vapors and mists may form explosive mixtures with air. Also, it is highly irritating to the skin and can attack plastics by resolution. The vapors are anesthetic and nerve are harmful. It is readily soluble in alcohols, ether and benzene.

The flash point is 28 ° C, the TRK value is 46 mg · m- third

Representation

Chlorobenzene is formed in the chlorination of benzene with chlorine in the presence of iron or iron chloride. We also find the unwanted byproduct Paradichlorobenzene arises.

Use

Chlorobenzene is used as solvent for oils, fats, resins, rubber, ethyl cellulose and phenolic resins. It also serves as a heat transfer agent and as a reactant in the production of certain silicones ( phenylsiloxanes ). In the manufacture of insecticides, dyes, pharmaceuticals and fragrances is formed as an intermediate product. In the U.S., it is used to make grinding wheels. In Germany naphthalene is used for this purpose.

Environment and Toxicology

Is chlorobenzene, like most halogenated aromatics, not readily biodegradable. It accumulates in nature in water sediments and is recorded via the drinking water of humans and animals. In animal tissues it is accumulated in adipose tissue and liver. It has a paralyzing effect by attacking the nervous tissue. The damage to fetuses is possible.

The readily detectable chlorobenzene is used in environmental technology as indicator substance for the presence of the much more toxic and harder detectable dioxins.

New process for the degradation of chlorobenzene in the environment make use of the ability of microorganisms to degrade halogenated aromatics in the presence of excess oxygen in the air by air is blown in polluted areas ( soil, water ).