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xylene

(dimethylbenzene xylene) is a colorless transparent liquid; It is the product of two hydrogen substituted by methyl groups on the benzene ring, and there are three isomers, namely, o-dimethylbenzene and p-dimethylbenzene. In industry, xylene refers to the mixture of the above isomers.

character

Colorless transparent liquid. Having a distinctive aroma of aromatic hydrocarbons.

It is a mixture consisting of 45% ~ 70% m-xylene, 15% ~ 25% p-xylene and 10% ~ 15% o-xylene. Easy to flow. It is miscible with anhydrous ethanol, ether and many other organic solvents

Xylene has pungent smell, flammable, and ethanol, chloroform or ether can be arbitrarily mixed, in water insoluble. Boiling point of 137 ~ 140 ℃. Xylene is a low-toxic chemical that the U.S. government's conference of industrial hygienologists (ACGIH) classifies as A4, meaning it lacks evidence of carcinogenicity to humans and animals. In plastic, fuel, rubber, additive of all sorts of coating and all sorts of adhesive, waterproof material, still can come from the burning gas of fuel and tobacco leaf.

Security measures

Keep away from fire and heat source. Avoid storage and transportation with oxidant. Do not use spark sensitive tools.

Extinguishing: foam, carbon dioxide, dry powder, sand.

Use role

Widely used in coating, resin, dye, ink and other industries as solvent; Used in medicine, explosives, pesticides and other industries as synthetic monomer or solvent; It can also be used as high octane gasoline component, which is an important raw material for organic chemical industry. It can also be used to remove asphalt from car bodies. The hospital pathology department is mainly used for the transparency and dewaxing of tissues and sections.

Industrial o-xylene as raw material, first with industrial concentrated sulfuric acid washing to the acid layer colorless, followed by 10% sodium hydroxide solution, water washing until qualified, separated from the water layer with anhydrous calcium chloride drying, and then rectification, after the distillate clear, collect the middle fraction, that is, pure product.