1-Naphthylamine

White, on the air discoloring reddish crystals with an unpleasant odor

Fixed

1.17 g · cm -3

50 ° C.

300 ° C.

• Sparingly soluble in water (1.7 g · l-1 at 20 ° C)
• Readily soluble in alcohol and ether

Attention

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1-naphthylamine is a derivative of naphthalene. It belongs to the group of aromatic amino compounds. In addition to the 1-naphthylamine, there is the isomeric 2-naphthylamine.

Production and representation

Historically

Nikolai Nikolaevich Zinin received ( called by him Naphtalidam ) 1-naphthylamine from 1- nitronaphthalene by reduction with hydrogen sulfide or nitrous acid.

Technically

Industrially, it is produced by naphthalene with nitrating acid ( nitric acid with sulfuric acid) to 1- nitronaphthalene is nitrated in the batch stirred tank. After separating the nitronaphthalene with iron is reduced to 1-naphthylamine.

Use

1-naphthylamine is used for the synthesis of azo dyes and herbicides aminonaphthalenesulfonic acids, naphtol, as well as phenylnaphthylamine and as an antioxidant for rubber. It continues to address the nitrite detection reagent with the Lunges.