[in-doh-fee-nawl, -nol]
noun Chemistry.
a quinonimine derivative that is the parent substance of the blue and green indophenol dyes.
any derivative of this compound.
any of various related dyes.

1890–95; indo- + phenol Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
indophenol (ˌɪndəʊˈfiːnɒl)
1.  a derivative of quinonimine. Formula: HOC6H4NC6H4O
2.  any of a class of derivatives of this compound, esp one of the blue or green dyes that are used for wool and cotton
[C19: from indigo + phenol]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Optimization of the indophenol blue method for the automated determination of ammonia in estuarine waters.
Ammonium in the sample reacts with phenol and alkaline hypochlorite to form a indophenol blue.
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