benzidine dye

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• dye — dyable, dyeable, adj. dyer, n. /duy/, n., v., dyed, dyeing. n. 1. a coloring material or matter. 2. a liquid containing coloring matter, for imparting a particular hue to cloth, paper, etc. 3. color or hue, esp. as produced by dyeing. 4. of the… …   Universalium

• benzidine — /ben zi deen , din/, n. Chem. a grayish, crystalline, slightly water soluble, basic compound, C12H12N2, usually derived from nitrobenzene: used chiefly in the synthesis of certain azo dyes, esp. Congo red. [1875 80; BENZ + ID3 + INE2] * * * ▪… …   Universalium

• benzidine yellow — noun : any of several azo pigments see dye table I (under Pigment Yellow 12) …   Useful english dictionary

• congo dye — noun Usage: usually capitalized C : any of a group of direct azo dyes most of which are derivatives of benzidine see dye table I * * * Congo color or Congo dye, any one of a group of direct azo dyes, usually derived from benzidine …   Useful english dictionary

• Acid dye — is a member of a class of dye that is applied from an acidic solution. In the home or art studio, the acid used in the dyebath is often vinegar (acetic acid) or citric acid. The uptake rate of the dye is controlled with the use of sodium chloride …   Wikipedia

• Congo dye — or Congo color n. any of certain azo dyes, derived mainly from benzidine * * * …   Universalium

• direct dye — also called  Substantive Dye,         any of a class of coloured, water soluble compounds that have an affinity for fibre and are taken up directly, such as the benzidine derivatives. Direct dyes are usually cheap and easily applied, and they can …   Universalium

• Congo dye — or Congo color n. any of certain azo dyes, derived mainly from benzidine …   English World dictionary

• test — 1. To prove; to try a substance; to determine the chemical nature of a substance by means of reagents. 2. A method of examination, as to determine the presence or absence of a definite disease or of some substance in any of the fluids, tissues,… …   Medical dictionary

• stain — 1. To discolor. 2. To color; to dye. 3. A discoloration. 4. A dye used in histologic and bacteriologic technique. 5. A procedure in which a dye or combination of dyes and reagents is used to color the constituents of cells and tissues. For… …   Medical dictionary

• Cyanide — This article is about the class of chemical compounds. For other uses, see Cyanide (disambiguation). The cyanide ion, CN−. From the top: 1. Valence bond structure 2. Space filling model 3. Electrostatic potential surface 4. Carbon lone pair… …   Wikipedia