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Oxide of Antimony

Insert 4 Antimony. Insert 4 fine powder into a quart flask; add 18 troy ounces muriatic acid, and digest in a sandbath until effervescence ceases. Then remove under the name of Spirits of Tin, Dyers' the bath and add 600 grains nitric acid, and Spirits, &c. (See Nos. 107, &c.) For this when nitrous fumes cease to be given off, and purpose, the acid is best made by mixing 2 the liquid has grown cold, add it to pint parts of muriatic acid with 1 part each of water, and filter. Pour the filtrate gradually nitric acid and water, all by measure. (Lie- into 12 pints water, constantly stirring, and big). The tin should be added by degrees, wash the precipitate twice by decantation, one portion being allowed to dissolve before using each time spirits water ; drain it through adding another; as, without this precaution, muslin, and then wash it with water until the the action is apt to become violent, the tem- washings cease to have an acid reaction. perature rise, and peroxide of tin to be depos- Add 1 fluid ounces water of ammonia, and, ited. (See No. 108.) A process which has after standing 2 hours , filter through wet been highly recommended, is to prepare a simple solution of the protochloride, and to convert it into the bichloride, either by the addition of nitric acid and a gentle heat, or by passing chlorine through it. muslin, and wash with distilled water as long as the washings form a precipitate with nitrate of silver. Then dry with a gentle heat on bibulous paper. (U.

S. Ph.) A greyishmuriatic and tartaric acids. white powder, insoluble in water, soluble in quid chloride of antimony, commercially