indophenol

American  

[in-doh-fee-nawl, -nol] / ˌɪn doʊˈfi nɔl, -nɒl /

noun

Chemistry.

1. a quinonimine derivative that is the parent substance of the blue and green indophenol dyes.

2. any derivative of this compound.

3. any of various related dyes.

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indophenol British  

/ ˌɪndəʊˈfiːnɒl /

noun

1. a derivative of quinonimine. Formula: HOC 6 H 4 NC 6 H 4 O

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

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Etymology

Origin of indophenol

First recorded in 1890–95; indo- + phenol

Example Sentences

Closely related to this group is a colouring-matter introduced by Köchlin and Witt in 1881 under the name of “indophenol.”

From Project Gutenberg

But while these intermediate blues resulting from the oxidation of a diamine in the presence of another amine are unstable, and pass readily into red azines, indophenol is stable, and can be used for dyeing and printing in the same way as indigo.

From Project Gutenberg

Indophenol discovered by Köchlin and Witt.

From Project Gutenberg

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 7½ lb. indophenol is used.

From Project Gutenberg

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.

From Project Gutenberg