Griffith's materia medica and pharmacy : for the use of medical and pharmaceutical students.

Date:
1887
Catalogue details

Licence: Public Domain Mark

Credit: Griffith's materia medica and pharmacy : for the use of medical and pharmaceutical students. 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.

    20/480 (page 8)
    The aqueous solution strikes a deep blue colour with starch. It sublimes without leaving any residue, and the portion that first comes over does not include any slender colourless prisms emitting a pungent odour, showing the absence of cyanide of iodine. It should not moisten bibulous paper, showing its freedom from water. Fixed impurities, as coal, black-lead, etc., are detected by sublimation. 12*7 grains dissolved in an ounce of water containing 15 grains of iodide of potassium require for complete discolouration 1,000 grain-measures of the volumetric solution of hyposulphite of sodium. [For an explanation of this test, see Volumetric Analysis.] BROMUM. B. P. Preps. Strength. Dose. Action and Use- Bromum Bromine Solution of (App. II.) 2 mins. to 1 oz. Caustic, deodorizer and disinfectant. Used to prepare the bromides of ammonium, sodium, and potassium. Test for detecting iodine in the bromides. Bromum. Obtained chiefly from bromide of magnesium, which is found in sea water and certain springs, by heating it with black oxide of manganese and sulphuric acid :— MgBr, + MnO^ + 2H2SO4 = MgSO^ -f MnSO^-f 2Hp + Br2. Bromine is a dark brownish-red, very volatile liquid, with a strong and disagreeable odour. Its specific gravity is 2-96 to 3-14:; with water it forms a crystalline hydrate at 32°. Pure bromine can be frozen. At the common temperature of the air it gives off red vapours, and at a temperature of 135° to 145° F. it boils. Like chlorine, it bleaches in the presence of water. Agitated with solution of soda in such proportion that the fluid remains very slightly alkaline, it forms a colour-