naphthamein
naphthamein noun: a product formed by the oxidation of naphthalamine (also called naphthylamine), which was observed to produce blue precipitates that later became purple but that was considered useless as a commercial dyeing agent due to its poor color quality.
Noun
naphthamein (uncountable)
- A product formed by the oxidation of naphthalamine (also called naphthylamine), which was observed to produce blue precipitates that later became purple but that was considered useless as a commercial dyeing agent due to its poor color quality.
- Piria* observed that naphthalamine and its salts produce blue precipitates, afterwards becoming purple, when brought in contact with perchloride of iron, terchloridc of gold, nitrate of silver, and other oxidizing agents. This product of oxidation he terms naphthamein.1862, W. H. Perkin, Esq., “On colouring matters derived from coal tar”, in Quarterly Journal of the Chemical Society of London, page 248
Origin of naphthamein
From French naphtaméine. By surface analysis, naphth(a) + -am + -ein.
Questions about naphthamein
- What does naphthamein mean?
- Naphthamein means a product formed by the oxidation of naphthalamine (also called naphthylamine), which was observed to produce blue precipitates that later became purple but that was considered useless as a commercial dyeing agent due to its poor color quality.
- What part of speech is naphthamein?
- Naphthamein is a noun.
Words near naphthamein in the dictionary
Source and license
Adapted from Wiktionary: naphthamein (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.
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