from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Containing a nitrogen group, especially N=N.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. azote, nitrogen
- adj. Applied loosely to compounds having nitrogen variously combined, as in cyanides, nitrates, etc.
- adj. Now especially applied to compounds containing a two atom nitrogen group (-N=N-) uniting two hydrocarbon radicals, as in azobenzene etc.
Those include Sunset Yellow and red Ponceau 4R, the so-called azo dyes that give Irn-Bru its hyper-orange sheen.
A large number of the dyes prepared from coal tar are called azo colours, such for instance are the Biebrich and Croceine scarlets and oranges, Naphthol black, Congo red, etc., just to name a few.
(called azo dyes) must be labeled not only with the relevant E number, but also with the words
Malagasy · Mitondra VIH mamaham-bolongana: Mbola azo atao ny mitia
And with Junge and Green, she discovered the azo-dye coupling reaction.
The company uses natural minerals and enzymes in their dying process and does not use chemicals like chlorine bleach, formaldehyde or azo.
Reductions can occur across nitrogen-nitrogen double bonds (azo reduction) or on nitro groups (NO2).
Listed are several of the reducing reactions. azo reduction dehalogenation disulfide reduction nitro reduction
Many azo pigments are illegal in cosmetics in Europe because they can break down into cancer-causing compounds, which may be absorbed into the skin.
Tattoo inks frequently consist of azo pigments that not only contain multiple impurities but also are manufactured for use as printing inks and for automobile paint.
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