• Webster's Revised Unabridged Dictionary
    • n Indophenol (Chem) 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.
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Century Dictionary and Cyclopedia
    • n indophenol 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.
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Webster's Revised Unabridged Dictionary
Ind,igo + phenol,


In literature:

Indophenol are thoroughly ground into a paste with 7 gallons of water and 2 pints caustic soda lye of 72 deg.
"The Dyeing of Woollen Fabrics" by Franklin Beech