from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various synthetic blue or green dyes.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of a class of blue or green dyes produced by oxidation of phenols and aromatic diamines
from the GNU version of the Collaborative International Dictionary of English
- n. Any one of a series of artificial blue dyestuffs, resembling indigo in appearance, and obtained by the action of phenol on certain nitrogenous derivatives of quinone. Simple indophenol proper, the parent compound of the dye series, is a quinonimine derivative with the formula C12H9NO2.
from The Century Dictionary and Cyclopedia
- n. A coal-tar color used in dyeing, produced by the simultaneous oxidation of a phenol and a paradiamine. It comes into commerce as a blue powder resembling indigo. It produces on cotton and wool indigo-blue shades, fast to light and bleaching-powder, but destroyed by even weak acids.
It has been proposed to employ the dye-stuff indophenol in conjunction with indigo, in which case the method of making the vat is with zinc, bisulphite of soda, caustic soda and ammonia as last described, only in place of using all indigo a mixture of 22 lb. indigo and 7-1/2 lb.
When applying the indophenol reaction, the solution must be treated as follows: 3-4 drops of hypochlorite solution is added, and the solution heated for a short time; or 5-6 drops hypochlorite solution may be added, and the solution left for some time, in which case the heating may be omitted.
By itself indophenol has not met with much favour from dyers for a variety of reasons, but it has been found that, mixed with indigo, it can be used in dyeing with some advantage on the score of cheapness.
+ NAD S Additional information (catalyzes NADH - and NADPH-linked reductions of low molecular weight acceptors such as 2,6-dichlorophenol - indophenol and ferricyanide )  P?