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A white, crystalline substance, C8H7N, obtained from blue indigo, and almost all indigo derivatives, by a process of reduction. It is also formed from albuminous matter, together with skatol, by putrefaction, and by fusion with caustic potash, and is present in human excrement, as well as in the intestinal canal of som…

embling indigo in appearance, and obtained by the action of phenol on certain nitrogenous derivatives of quinone. Simple indophenol proper has not yet been isolated.

Any of several isomeric iodine derivatives of the cresols, C6H3I(CH3)OH, esp. one, an odorless amorphous powder, used in medicine as a substitute for iodoform.

ance, C8H5NO2, obtained by the oxidation of indigo blue. It is also produced from certain derivatives of benzoic acid, and is one important source of artificial indigo. [Written also, less properly, isatine.]

ly or crystalline substance, by the action of sulphur trioxide on alcohol or ether. It is derivative of sulphuric acid.

A crystalline hydrocarbon derivative, metameric with orcin, but produced artificially; -- called also cresorcin.

hite, crystalline substance obtained as an anhydride of alanine, and regarded as an imido derivative of lactic acid.

Pertaining to, or designating, an organic amido acid, which is regarded as a derivative of lactic acid and urea.

A nitrogenous organic base obtained by the oxidation of amarine, and regarded as a derivative of benzoic aldehyde. It is obtained in long white crystalline tufts, -- whence its name.

dextrorotatory according to the temperature and concentration. An artificial variety is a derivative of succinic acid, but has no action on polarized light, and thus malic acid is a remarkable case of physical isomerism.

an artificial aniline dyestuff used for coloring silk and wool, and regarded as a complex derivative of quinoline.

rmediate; specif. (Chem.), denoting a type of hydrocarbons which are regarded as methenyl derivatives. Also used adjectively.

Of, pertaining to, or designating, a sulphonic (thionic) acid derivative of methane, obtained as a stable white crystalline substance, CH2.(SO3H)2, which forms well defined salts.

ut regarded as an essential residue of methane, and appearing as a component part of many derivatives; as, methyl alcohol, methyl ether, methyl amine, etc. [Formerly written also methule, methyle, etc.] Methyl alcohol (Chem.), a light, volatile, inflammable liquid, CH3.OH, obtained by the distillation of wood, and henc…

ot known in the free state, but regarded as an essential residue and component of certain derivatives of methane; as, methylene bromide, CH2Br2; -- formerly called also methene. Methylene blue (Chem.), an artificial dyestuff consisting of a complex sulphur derivative of diphenyl amine; -- called also pure blue.…

See Muscardin. Northern muscadine (Bot.), a derivative of the northern fox grape, and scarcely an improvement upon it. -- Royal muscadine (Bot.), a European grape of great value. Its berries are large, round, and of a pale amber color. Called also golden chasselas.

terials, such as the heavy oil of coal tar. It is the type and basis of a large number of derivatives among organic compounds. Formerly called also naphthaline. Naphthalene red (Chem.), a dyestuff obtained from certain diazo derivatives of naphthylamine, and called also magdala red. -- Naphthalene yellow (Chem.), a ye…

e substance, called naphthalenic acid and also hydroxy quinone, and obtained from certain derivatives of naphthol.

elated to, naphthalene; -- used specifically to designate any one of a series of carboxyl derivatives, called naphthoic acids.

Any one of a series of hydroxyl derivatives of naphthalene, analogous to phenol. In general they are crystalline substances with a phenol (carbolic) odor. Naphthol blue, Naphthol orange, Naphthol yellow (Chem.), brilliant dyestuffs produced from certain complex nitrogenous derivatives of naphthol or naphthoquinone.…