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A salt of oxalic acid.

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

A salt of mesoxalic acid.

om odor, so called from its tendency to form blue compounds; obtained by heating ammonium oxalate, mercuric cyanide, etc. It is obtained in combination, forming an alkaline cyanide when nitrogen or a nitrogenous compound is strongly ignited with carbon and soda or potash. It conducts itself like a member of the halogen…

solid green, etc. It is usually found as a double chloride, with zinc chloride, or as an oxalate. (b) See Paris green (below). -- Gaignet's green (Chem.) a green pigment employed by the French artist, Adrian Gusgnet, and consisting essentially of a basic hydrate of chromium. -- Methyl green (Chem.), an artificial ro…

a white crystalline substance, inappropriately named, as it consists of an acid potassium oxalate and contains no citric acid, which is the characteristic acid of lemon; -- called also salis of sorrel. It is used in removing ink stains. See Oxalic acid, under Oxalic. [Colloq.]

ly. 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 sawdust, as a white crystalline substance, which has a strong acid taste, and is poisonou…

A yellow mineral consisting of oxalate of iron.

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

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

alt of soda (Old Chem.), sodium carbonate. -- Salt of sorrel (Old Chem.), acid potassium oxalate, or potassium quadroxalate, used as a solvent for ink stains; -- so called because found in the sorrel, or Oxalis. Also sometimes inaccurately called salt of lemon. -- Salt of tartar (Old Chem.), potassium carbonate; -- s…

blesome weed (Rumex Acetosella), also called sheep sorrel. -- Salt of sorrel (Chem.), binoxalate of potassa; -- so called because obtained from the juice of Rumex Acetosella, or Rumex Axetosa. -- Sorrel tree (Bot.), a small ericaceous tree (Oxydendrum arboreum) whose leaves resemble those of the peach and have a sour…

Calcium oxalate, occurring in colorless or white monoclinic crystals.