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found in, and characteristic of, oxalis, and also certain plant of the Buckwheat family. Oxalic acid (Chem.), a dibasic acid, existing combined in oxalis as an acid potassium oxalate, and in many plant tissues as the calcium oxalate. It is prepared on a large scale, by the action of fused caustic soda or potash on saw…

Made or derived from oxalic acid; as, desoxalic acid.

Pertaining to, or designating, an aldehyde acid, intermediate between glycol and oxalic acid. [Written also glyoxylic.]

Pertaining to, or designating, an acid, CH2O2(CO2H)2, obtained from amido malonic acid.

A salt having two equivalents of oxalic acid to one of the base; an acid oxalate.

f replacement by basic atoms or radicals, in forming salts; bibasic; -- said of acids, as oxalic or sulphuric acids. Cf. Diacid, Bibasic.

Containing two carbon residues, or two carboxyl or radicals; as, oxalic acid is a dicarbonic acid.

n of methyl alcohol, by the reduction of carbonic acid or the destructive distillation of oxalic acid. It is the first member of the fatty acids in the paraffin series, and is homologous with acetic acid.

obtained by the partial oxidation of glycol. It is a double aldehyde, between glycol and oxalic acid.

tic acid of lemon; -- called also salis of sorrel. It is used in removing ink stains. See Oxalic acid, under Oxalic. [Colloq.]

A salt of mesoxalic acid.

A salt of oxalic acid.

A hydrocarbon radical (C2O2) regarded as a residue of oxalic acid and occurring in derivatives of it.

ignating, an acid NH2.C2O2.HO obtained as a fine crystalline powder, intermediate between oxalic acid and oxamide. Its ammonium salt is obtained by boiling oxamide with ammonia.

nce (C2O2(NH2)2) obtained by treating ethyl oxalate with ammonia. It is the acid amide of oxalic acid. Formerly called also oxalamide.

Pertaining to, or derived from, oxalic acid and aniline; -- used to designate an acid obtained in white crystalline scales by heating these substances together.

ing oxanilamide, obtained by heating aniline oxalate, and regarded as a double anilide of oxalic acid; -- called also diphenyl oxamide.

Pertaining to, or designating, a dibasic acid of the oxalic series found in archil (Roccella tinctoria, etc.), and other lichens, and extracted as a white crystalline substance C17H32O4.

designating, an organic acid (called also hydroxy malonic acid) obtained, by reducing mesoxalic acid, as a white crystalline substance.