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Any one of a series of complex nitrogenous bases obtained by the union of certain aniline derivatives with glyoxal or with certain ketones. [Written also chinoxaline.]

The hypothetical radical of certain quinone derivatives related to rhodizonic acid.

a substitute for cochineal, archil, etc. It consists of the sodium salt of a complex azo derivative of naphtol.

A phenol derivative of anthracene obtained as a white crystalline substance, which on oxidation produces a red dyestuff related to anthraquinone.

An orange-red nitrogenous dyestuff produced artificailly by oxidizing certain aniline derivatives, and used in dyeing silk and wool; also, any one of the series of which safranine proper is the type.

A triacid alcohol, related to glycerin, and obtained from certain styryl derivatives as a yellow, gummy, amorphous substance; - - called also phenyl glycerin.

A hypothetical radical found in certain derivatives of styrolene and cinnamic acid; -- called also cinnyl, or cinnamyl.

Of, pertaining to, or designating, an acid amide derivative of succinic acid, obtained as a white crystalline substance, and forming a series of salts.

A hypothetical radical characteristic of succinic acid and certain of its derivatives.

amide; derived from, or related to, a sulphamide; specifically, designating an amido acid derivative, NH2.SO2.OH, of sulphuric acid (analogous to sulphonic acid) which is not known in the free state, but is known in its salts.

alline substance, C6H4.(SO2.CO).NH, produced artificially by the oxidation of a sulphamic derivative of toluene. It is the sweetest substance known, having over two hundred times the sweetening power of sugar, and is known in commerce under the name of saccharine. It has acid properties and forms salts (which are inacc…

A compound, analogous to a hydrate, regarded as a salt of sulphydric acid, or as a derivative of hydrogen sulphide in which one half of the hydrogen is replaced by a base (as potassium sulphydrate, KSH), or as a hydrate in which the oxygen has been wholly or partially replaced by sulphur.

Of, pertaining to, or designating, an acid which is the primary acid amide derivative of tartaric acid.

An acid amide derivative of tartaric acid, obtained as a white crystalline substance.

tificial dyestuff obtained as an orange-yellow powder, and regarded as a phenyl hydrazine derivative of tartaric and sulphonic acids.

tively) used in chemistry to denote the presence of tartar or of some of its compounds or derivatives.

ical radical constituting the characteristic residue of tartronic acid and certain of its derivatives.

The condition, quality, or relation of metameric substances, or their respective derivatives, which are more or less interchangeable, according as one form or the other is the more stable. It is a special case of metamerism; thus, the lactam and the lactim compounds exhibit tautomerism.

carbon, C4H8, analogous to trimethylene, and regarded as the base of well-known series or derivatives.

Of, pertaining to, or designating, a thionic derivative, H