The pharmacopoeia of the United States of America / by authority of the National Convention for Revising the Pharmacopoeia, held at Washington, A.D. 1860.

Date:
1864
Catalogue details

Licence: Public Domain Mark

Credit: The pharmacopoeia of the United States of America / by authority of the National Convention for Revising the Pharmacopoeia, held at Washington, A.D. 1860. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

    79/440 (page 45)
    Potass,e Nitras. Nitrate of Potassa. In colourless, prismatic crystals, unalterable in the air, and wholly soluble in water. The solution yields no precipitate with chloride of barium or nitrate of silver. With bichloride of platinum it gives a yellow precipitate. By a strong heat the salt is first melted and then decomposed, oxygen escaping, and a salt remains which emits orange-coloured fumes on the addition of sulphuric acid. If one hundred grains of Nitrate of Potassa, previously dried, be mixed with sixty grains of officinal sulphuric acid, and the mixture be kept at a red heat until the salt ceases to lose weight, the residue will weigh eighty-six grains. PoTASSiE Permanganas. Permanganate of Potassa. In needle-shaped crystals, of a deep-purple colour. It is soluble in sixteen parts of cold water, with the exception of a scanty, brown matter. A very dilute solution has a rose colour, free from green tinge, and is instantly decolorized by the officinal solution of arsenite of potassa, with the formation of a brown precipitate. Potass^ Sulphas. Sulphate of Potassa. In hard, colourless crystals, unalterable in the air, sparingly soluble in cold water, and insoluble in alcohol. The solution is not precipitated by ammonia. With bichloride of platinum it yields a yellow precipitate, and with chloride of barium a white one, insoluble in nitric acid. Potassii Ferrocyanidum. Ferrocyanide of Potas- sium. Potassii Ferrocyanuretunij Pharm., 1850. In crystals of a lemon-yellow colour, wholly soluble in water. The solution yields with most of the salts of sesquioxide 7