\hˌa͡ɪdɹəsɪˈanɪk ˈasɪd], \hˌaɪdɹəsɪˈanɪk ˈasɪd], \h_ˌaɪ_d_ɹ_ə_s_ɪ__ˈa_n_ɪ_k ˈa_s_ɪ_d]\
Definitions of HYDROCYANIC ACID
- 2011 - English Dictionary Database
- 2010 - Medical Dictionary Database
- 1920 - A practical medical dictionary.
- 1898 - Warner's pocket medical dictionary of today.
- 1846 - Medical lexicon: a dictionary of medical science
- 1898 - American pocket medical dictionary
- 1916 - Appleton's medical dictionary
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By DataStellar Co., Ltd
By DataStellar Co., Ltd
By Stedman, Thomas Lathrop
By William R. Warner
This acid exists in a great variety of native combinations in the vegetable kingdom, and imparts to them certain properties, which have been long known and esteemed; as in the bitter almond, cherry laurel, leaves of the peach tree, kernels of fruit, pips of apples. When concentrated, it is liquid, colourless, of a strong smell and taste, at first cool, afterwards burning. Its s.g. at 7 Centigrade, is 0.7058. It is very volatile, and enters into ebullition at 80 Fahr. It speedily undergoes decomposition, sometimes in less than an hour, and consists of a peculiar gazeous and highly inflammable compound of carbon and azote, to which the name Cyan'ogen has been assigned; and of hydrogen, which acts as the acidifying principle; hence its name Hydrocyanic acid. In the Pharmacopoeia of the United States, (1851,) two formulae for the preparation of the Acidnm hydrocyan'icum dilu'tum- Acidum hydrocyan'icum, Ph. U.S. of 1842- are given; the one from the Ferro-cyanuret of Potassium; the other from the Cyanuret of Silver. According to Magendie, the acid, prepared after Scheele's method- the one in common use- is of irregular medicinal power: he, therefore, recommends Gay Lussac's acid, diluted with 6 times its volume, or 8.5 times its weight of distilled water, for medicinal purposes, and this he calls Medicinal Prussic Acid. Dr. Ure has proposed, that the specific gravity should indicate that which is proper for medicinal exhibition; and, after comparative experiments of the gravity of the acids, obtained by different processes, he states, that the acid, usually prescribed, is of s.g. 0.996 or 0.997. Great caution is, however, necessary. One drop of pure prussic acid may instantly destroy, and the animal show hardly any traces of irritability, a few moments after death. It has been advised in laryngeal phthisis, in pulmonary phthisis, pulmonary inflammation and irritation, dyspepsia, uterine affections, hectic cough, cancer, chronic rheumatism, and mania, and as a local remedy in impetiginous affections; but, although possessed of powerful sedative properties, it is so unmanageable and the preparation so uncertain, that it is not much used. The Dose of Scheele's Acid, or of the Medicinal Prussic Acid, is from a quarter of a drop to two drops.
By Robley Dunglison
By Willam Alexander Newman Dorland
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