Noun:

रंगनेवाला पदार्थ, रंग बनानेवाला पदार्थ,

dyestuffs's Usage Examples:

The trioxyanthraquinones - purpurin, anthrapurpurin, anthragallol and flavopurpurin - are also very valuable dyestuffs.

Brandy, cigars and dyestuffs are among the manufactures of the place.

The azo compounds are intensely coloured, but are not capable of being used as dyestuffs unless they contain salt-forming, acid or basic groups.

Derivatives of this group are important as substantive cotton dyestuffs.

At the same time, however, all dyestuffs are coloured substances.

Benzo-ortho-diazines exist in two structural forms, cinnolin and phthalazine; benzo-meta-diazines are known as quinazolines; benzo-para-diazines are termed quinoxalines; the dibenzo-compounds are named phenazines, this last group including many valuable dyestuffs - indulines, safranines, 'c. In addition to the types of compounds enumerated above we may also notice purin, tropine and the terpenes.

Benzo-orthoxazines, -metoxazines and -paroxazines are known: dibenzoparoxazine or phenoxazine is the parent of a valuable series of dyestuffs; dibenzoparathiazine or thiodiphenylamine is important from the same aspect.

All four mono-hydroxyxanthones are known, and are prepared by heating salicylic acid with either resorcin, pyrocatechin or hydroquinone; they are yellow crystalline solids, which act as dyestuffs.

OH N (CH 3) 2 (i 3), are extensively employed in the manufacture of the important dyestuffs known as the rhodamines.

By the entrance of amino or hydroxyl groups into the molecule dyestuffs are formed.

Synonyms:

azo dye, cochineal, Kendal green, colouring material, vat dye, saffranine, cyanine dye, orchil, fluorescent dye, blue, indigo, sugar of lead, hair coloring, alizarin yellow, cudbear, basic colour, lead acetate, fluoresceine, fluorescein, aniline dye, vat color, fluorochrome, basic dye, hair dye, colour, woad, blueing, bromothymol blue, color, bromthymol blue, bromphenol blue, substantive dye, direct dye, tetrabromo-phenolsulfonephthalein, radiopaque dye, Kendal, basic color, archil, safranine, acid dye, anil, dye, quercitron, resorcinolphthalein, bluing, safranin, chromophore, coloring material, Tyrian purple, bromophenol blue, lac dye, indigotin,

Antonyms:

achromatic color, colored, uncolored, colorlessness, discolor,