CHAPTER XXIV 



GROUP OF ARSENIC, ANTIMONY AND PHOSPHORUS 

 ARSENUM — ARSENIC 



The metal is not used in medicine. 



ARSENI TRIOXIDUM — ARSENIC TRIOXIDE 



Synonyms. White Arsenic, Arsenous Acid, Arsenous Oxide 



Arsenic trioxide occurs either as an opaque, white powder, or in 

 irregular masses of two varieties: one, amorphous, transparent and 

 colorless like glass (glassy) ; the other, crystalline, opaque, and white, 

 resembling porcelain (porcelain). Both varieties are odorless, taste- 

 less, soluble in 30 parts of water (glassy) 100 parts (porcelain), in 

 15 parts of boiling water, slightly soluble in alcohol and ether, and 

 freely soluble in glycerin and in hydrochloric acid and alkaline solu- 

 tions. 



Preparations and Doses. 



Arseni Trioxidum. H. and C. Tonic gr. iij — ^v ; 0.2 — 0.3. 

 Vermicide. H. gr. vij — xv; 0.5 — 1. Sh. and Sw. gr. Ko — 

 j ; 0.006—0.06. Dog gr. Veo— Mo ; 0.001—0.006. 



Liquor' Acidi Arsenosi. Solution of arsenous acid. A 1 per 

 cent, solution in water and hydrochloric acid. It is especially useful 

 in preparations where Fowler's solution would be incompatible. 



Doses. H. and C. 3 ij — ^viij ; 8 — 30. Sheep and Pig. TTL 

 XV — xlv; 1. — 3. Dog. lU j — ^x; .06 — 0.6. Three times 

 daily. 



Liquor Potassii Arsenitis. Solution of Potassitun Arsenite, Fow- 

 ler's Solution of Arsenic. This is a 1 per cent, solution in water and 

 potassium bicarbonate, flavored and colored with compound tincture 

 of lavender. Doses are the same as for the above. 



Liquor Arseni et Hydrargyri lodidi. Solution of Arsenous and 

 Mercuric iodides. Donovan's Solution. One per cent, solution of 

 each iodide in water. Doses the same as above preparations. 



SODII ARSENAS — SODIUM ARSENATE 



Sodium Arsenate occurs as colorless, transparent, monoclinic 



prisms, odorless, and having a mild alkaline taste ; efflorescent in dry 



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