induline

Century Dictionary and Cyclopedia

1. n. A name of various coaltar colors used in dyeing. The various members of the group called indulines are made by different processes, but all possess somewhat similar dyeing properties. Those used for dyeing cotton are insoluble in water, and require to be dissolved in alcohol. For dyeing wool and silk they are made soluble in water by strong sulphuric acid. They all yield dark dull-blue colors similar to indigo. They are fairly fast to light, only moderately so to weak alkalis, but withstand the action of acids perfectly. These colors are all closely related to violaniline (which see). Those soluble in alcohol are obtained by phenylizing violaniline. They are known by a variety of commercial names, as violaniline, nigrosine, Elberfeld blue, bengaline, aniline gray, Coupier's blue, Roubaix blue, etc.

Wiktionary

1. n. organic chemistry Any of a series of blue, bluish-red and black dyestuffs, formed by the interaction of para-amino azo compounds with primary monoamines in the presence of a small quantity of a mineral acid.

GNU Webster's 1913

1. n. Any one of a large series of aniline dyes, colored blue or violet, and represented by aniline violet.
2. n. A dark green amorphous dyestuff, produced by the oxidation of aniline in the presence of copper or vanadium salts; -- called also aniline black.