Diphenylether

• Phenyl ethers
• Diphenyl oxide
• Phenoxybenzene
• 1,1 '- Oxibisbenzol

Colorless, flammable solid with geranienartigem odor

Fixed

1.07 g · cm -3

26.9 ° C

258 ° C

8 Pa ( 20 ° C)

Insoluble in water ( 21 mg · l-1 at 20 ° C)

1.579 (20 ° C)

Risk

1 ml · m -3 or 7.1 mg · m-3

2450 mg · kg -1 ( LD50, rat, oral)

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Ether is a chemical compound from the group of ether. It consists of two linked via an oxygen atom of benzene rings.

Production and representation

Diphenyl ethers and many of its properties were first published in early 1901. The display is via an Ullmann condensation, by reaction of phenol and bromobenzene in the presence of a base and a copper catalyst, such as:

Due to side reactions diphenylether is a significant by-product of Hochdruckhydrolyse of chlorobenzene in the production of phenol.

Use

Diphenyl ether is used as the rose perfume for soaps and detergents and as a heat transfer agent. It is the starting material for many chemical syntheses and compounds derived. For example, its brominated derivatives ( polybrominated diphenyl ethers) are used as flame retardants in many plastics and fabrics. The amine derivative furnace used for the production of diphenyl ether herbicides.

Safety

The vapors of diphenyl combine with air to form an explosive mixture (flash point 115 ° C, ignition temperature 610 ° C).