Nigrosine
The nigrosines are a group of blue-black dyes that belong to the diaminophenazine compounds and to the anionic dyes .
| Nigrosine | |||
|---|---|---|---|
| Surname | water soluble nigrosine | alcohol-soluble nigrosine | oil soluble nigrosine |
| Color name | Acid Black 2 | Solvent Black 5 | Solvent Black 7 |
| Color index | CI 50420 | CI 50415 | CI 50415: 1 |
| CAS | 8005-03-6 | 11099-03-9 | 8005-02-5 |
Manufacturing
Nigrosine are obtained by heating nitrobenzene , aniline and aniline hydrochloride with metallic iron and iron (III) chloride . The exact composition or the structures of the dyes are unknown.
use
Nigrosine is used for dyeing and printing wool , for dyeing silks, leather, shoe creams, varnishes, plastics, stoving enamels , writing inks, stamp inks and as microscopic dyes.
Individual evidence
- ↑ a b Entry on Nigrosine. In: Römpp Online . Georg Thieme Verlag, accessed on January 19, 2014.
- ↑ John Arthur Wilson: The chemistry of leather manufacturing. Springer-Verlag, 2013, ISBN 978-3-7091-5909-5 , p. 766 ( limited preview in the Google book search).