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in dyeing calico, and was obtained in a large quantities from guano. Formerly called also ammonium purpurate.

ne body originally obtained from bile. Chemically, however, choline is oxyethyl-trimethyl-ammonium hydroxide, while neurine is vinyl-trimethyl-ammonium hydroxide. [Written also neurin.]

Niter. Nitrum flammans Etym: [L., flaming niter] (Old Chem.), ammonium nitrate; -- probably so called because it deflagerates when suddenly heated.

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

or compared with, five atoms of hydrogen or other monad; as, nitrogen is a pentad in the ammonium compounds.

The hypothetical radical PH4, analogous to ammonium, and regarded as the nucleus of certain derivatives of phosphine.

of the eyeball. -- Pink salt (Chem. & Dyeing), the double chlorides of (stannic) tin and ammonium, formerly much used as a mordant for madder and cochineal. -- Pink saucer, a small saucer, the inner surface of which is covered with a pink pigment.

in a gray, porous, spongy form, obtained by reducing the double chloride of platinum and ammonium. It absorbs oxygen, hydrogen, and certain other gases, to a high degree, and is employed as an agent in oxidizing.

tance obtained by adding a solution of corrosive sublimate to a solution of sal ammoniac (ammonium chloride); -- formerly called also fusible white precipitate.

, salt of sorrel. -- Sal alembroth. (Old Chem.) See Alembroth. -- Sal ammoniac (Chem.), ammonium chloride, NH4Cl, a white crystalline volatile substance having a sharp salty taste, obtained from gas works, from nitrogenous matter, etc. It is largely employed as a source of ammonia, as a reagent, and as an expectorant…

een vitriol, or sulphate of iron. -- Salt of hartshorn. (Old Chem.) (a) Sal ammoniac, or ammonium chloride. (b) Ammonium carbonate. Cf. Spirit of hartshorn, under Hartshorn. -- Salt of lemons. (Chem.) See Salt of sorrel, below. -- Salt of Saturn (Old Chem.), sugar of lead; lead acetate; -- the alchemical of lead bei…

The hypothetical radical SbH4, analogous to ammonium; -- called also antimonium.

A salt of uric acid; as, sodium urate; ammonium urate.