Azomethine Dyes
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
Azomethine Dyes
organic dyes whose molecules contain the characteristic chromophore groups—CH=N—. The azomethine dyes include one of the first synthetic dyes, purple-red murexide. Its formation serves as a characteristic reaction for uric acid, which forms this dye during evaporation with diluted HNO3 and the subsequent addition of ammonia.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.