Antimonii Oxidum

Acidum sulpburicum retorts infunde, paulatim addens sodae muriatem et antimonii oxidum, prius commista dein super are-nam calidam fiat distillatio. Materia distillata per aliquot dies aeri pateat, ut liquescat turn effundatur e fascibus pars liquida. 

Antimony trioxid—Antimonous anhydrid—Oxid of antimony —Antimonii oxidum (U. S. Br.)—SbaOs—388—occurs in nature and is prepared artificially by decomposing the oxychlorid or by heating Sb in air. 

Antimonii Oxidum. Antimonium Tartaratum. Belladonn Folia. 

Ammonia Carbonas. Antimonii Oxidum. Camphora. Hyoscyami Folia. Ipecacuanha. 

Official Preparation of Antimony Trioxide (antimonii oxidum) — Sulplude of antimony in very fine powder, 4 oz. troy hydrochloric acid, 18 oz, troy nitric acid, 1 oz. troy liquor ammonise, IJ fl. oz. distilled water. The sulphide is put into a flask containing hydrochloric acid, and is then digested by means of a sand-bath until effervescence ceases. Thai add nitric acid gradually. When the nitrous acid vapours have ceased to be given off, the solution is allowed to cool. Add half a pint of water and filter. Pour the filtered liquid gradually into 12 pints of water, constantly stir it, and allow the precipitate to subside Decant the liquid and wash the precipitate twice- on each occasion with 8 pints of water. Then transfer it to a muslin filter to drain, and wash it until the acid reaction ceases. Introduce it into a vessel and subject it to the action of liquor ammonias for two hours. Then transfer it to a muslin filter and wash it until the filtrate gives no precipitate when silver nitrate is added. Dry it finally in a gentle heat. 

---