CHAPTEE XXVI 

 SULPHUR COMPOUNDS 



This group contains sulphur, hydrogen sulphide, sulphides, poly- 

 sulphides, thiosulphite, ichthyol and thiol. 



Sulphur occurs in the following three forms, sulphur sublima- 

 tum, sulphur lotum and sulphur prsecipitatum. 



SULPHUR SUBLIMATUM 



Synonyms. Sublimed Sulphur, Flowers of Sulphur, Sublimed 



Crude Sulphur 



Properties. Fine yellow powder, slightly characteristic odor and 

 faint acid taste. It is insoluble in water, nearly insoluble in absolute 

 alcohol, ether, chloroform, boiling solutions of alkaline hydrates, oil 

 of turpentine and some other oils. 



Preparation. 



Unguentum Sulphuris, 15 per cent, in benzoinated lard. 



SULPHUR LOTUM 



Washed Sulphur 



This is the ordinary sulphur washed with ammonia water to re- 

 move the free acids. 

 Preparation. 



Pulvis Olycyrrhizce Compositus, Compound licorice powder, 

 8 per cent. 



SULPHUR PR^CIPITATUM 



Lac sulphur, milk of sulphur. This is made by precipitating a 

 solution of sulphurated lime with hydrochloric acid. It is a fine 

 amorphous powder, of pale yellow color, with other characteristics 

 similar to sublimed sulphur. 



Doses of sulphur. H. gij — iv; 60. — 120. D. 3ss— iv; 2. — 

 15. 



Action. Sulphur itself is insoluble in the tissue fluids or diges- 

 tive secretions and has no action. When administered by the mouth, 

 a large part is eliminated unchanged, but some is converted into sul- 



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