[dahy-fen-l-uh-meen, -am-in, -feen-]

noun Chemistry.

a colorless, crystalline, slightly water-soluble benzene derivative, C12H11N, used chiefly in the preparation of various dyes, as a stabilizer for nitrocellulose propellants, and for the detection of oxidizing agents in analytical chemistry.

Origin of diphenylamine

First recorded in 1860–65; diphenyl + amine
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for diphenylamine

Historical Examples of diphenylamine

  • Rottweil Smokeless Powder: a gelatined powder containing camphor and diphenylamine.

  • The parent-compound is diphenylamine in which sulphur replaces hydrogen, and is therefore known as thiodiphenylamine.


    Raphael Meldola

  • It was shown that they are derivatives of diphenylamine containing sulphur as an essential constituent.


    Raphael Meldola

  • Their reactions with diphenylamine allow a certain identification of artificial silks of this class.

British Dictionary definitions for diphenylamine



a colourless insoluble crystalline derivative of benzene, used in the manufacture of dyes, as a stabilizer in plastics, etc. Formula: (C 6 H 5) 2 NH
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

diphenylamine in Medicine


[dī-fĕn′əl-ə-mēn, -ămĭn, -fē′nəl-]


A colorless crystalline compound used as a stabilizer for plastics and in the manufacture of dyes, explosives, pesticides, and pharmaceuticals.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.