ACIDS 201 



The sulphides undergo oxidation in the blood and escape in the urine 

 as sulphates and organic sulphur compounds and in the breath and sweat 

 as hydrogen sulphide. Sulphurated potassa has been administered inter- 

 nally as a substitute for sulphur, but is only of value externally. 



Action and Uses External. — Sulphurated potassa is one of the most 

 serviceable agents we possess in the treatment of chronic forms of skin 

 dieases, as acne, mange, lichen, but particularly eczema of the horse and 

 dog. It is locally stimulant, alterative (?), and parasiticide. There is 

 only one drawback to its general use, which is its exceedingly disagreeable 

 odor. Peruvian balsam is frequently substituted for this reason in the 

 treatment of skin diseases in dogs. A solution, "yellow lotion," is used 

 in different strengths (1-8 to 1-15), according to the amount of stimula- 

 tion which the skin will endure. The "yellow lotion" is a good agent for 

 killing lice upon the skin. The following prescription will be found of 

 benefit in eczema in canine practice: 



Potassae sulphuratae 3iiss. 



Chloralis 3ss. 



01. anisi _ 1Tl,ii. 



Aquae ad giv. 



M. 



S. External use. 



The chloral relieves itching and the anise disguises to some extent 

 the odor of hydrogen sulphide. 



SECTION XI. 



Acids. 



AciDUM Hydbochloricum. Hydrochloric Acid. HCl. (U. S. & B. P.) 



(Muriatic Acid.) 



Synonym. — Acidum muriaticuxn, s. hydrochloratum, s. chlorhydricum, E. ; 

 acide chlorhydrique, s. muriatique, Fr.; salz saiire, G. 



An aqueous solution containing not less than 31 per cent, nor more than 33 

 per cent, of HCl. (U. S. P.) 



Derivation. — Distil together sulphuric acid, sodium chloride and water. The 

 resulting hydrochloric acid gas is passed into distilled water, while acid sodium 

 sulphate remains in the retort and is further acted upon by sodium chloride. 

 Na Cl+HjS Oi = H Cl-|-Na HSO,; then: Na HSO.-j- Na CI =: H Cl-f-Na^SO.. 



Properties. — A colorless, fuming liquid, having a pungent odor and an intense- 

 ly acid taste. Spec, gr., about 1.155 at 25° C. Miscible, in all proportions, with 

 water and alcohol. 



Incompatibles. — Alkaline and other carbonates, and lead and silver salts. 



PHEPAHATIOirS. 



Acidum Hydrochloricum Dilutum, Acidum Nitrohydrochloricum, Acidum Nitro- 



hydrochloricum Dilutum. 

 Acidum Hydrichloricum Dilutum. Diluted Hydrochloric Acid. (U. S. & B. P.) 



(Diluted Muriatic Acid.) 



Derivation. — Hydrochloric acid, 100; distilled water, 220. Diluted hydro- 

 chloric acid contains 9.5 to 10.5 per cent, of absolute hydrochloric acid. (U. S. P.) 



Properties. — It does not fume in the air and is without odor. Spec, gr., 1.04!9. 

 Otherwise corresponds to hydrocUoric acid. (U. S. P.) 



X»o«e.— H., 3i-ii, (4-8); C, 3ii-iv, (8-15); Sh., Sss-i, (2-4); Sw. & D., 

 1H,x-xxx, (.6-2). 



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