27 
forming clear, low-colored solutions, which rapidly change to 
deep red. 
Dose. — “Average dose: 0.250 Gm. = 250 milligrammes (4 grains).*’ 
(U. S. P.) 
It is used in general for the same purposes as the subnitrate. 
BISMUTHI SUBSALICYLAS. 
Bismuth Subsalicylate. 
Official under the names of Bismutum subsalicylicum (P. G.), Bis- 
mutum salicylicum (Swiss), Bismuthi Salicylas (Br. P.). The compo- 
sition varies somewhat, but is approximately C6H^(0H)C0.2Bi0. The 
LI. S. Pharmacopoeia requires that it yield not less than 62 per cent, 
nor more than 64 per cent, of pure bismuth oxide. 
Character. — “A white, or nearly^ white, amorphous or crystalline 
powder, odorless, tasteless, and permanent in the air.” 
Solubility. — Almost insoluble in water; on prolonged boiling with 
water, a more basic salt is formed through the splitting off of free 
salicylic ‘acid. Alcohol or ether extracts salicylic acid, with decompo- 
sition of the salt. Acids decompose it, with separation of a white, 
flocculent precipitate of salicydic acid. 
Dose. — “Average dose: 0.250 Gm. = 250 milligrammes (4 grains).” 
(U. S. P.) 
other Unofficial Bismuth Compounds. — A large number of bismuth 
compounds have been proposed for medicinal use in the last few years. 
The following may be mentioned as examples: A trot (bismuth oxyiodo- 
subgallate), hismal (bismuth methylene digallate), hismutol (“bismuth 
sodium phosphate salicydate ”), crurin (quinolin bismuth sulphoc 3 "a- 
nate), eudoxin (bismuth tetraiodo-phenolphthalein), iodogcdlicln (bis- 
muth oxydodide methyd-gallol), orpliol (bismuth betanaphthol), other 
phenolates, the benzoate, the chrysophanate {dermal)^ the cinnamydate 
{hetoform), the cresolate, the lactate, the bilactomonotannate {lactanine). 
the phenolsulphonate, the tannate, and similar salts; also proteid 
compounds, as the peptonate; compounds with resorcin, pvrogallol 
{helcosol)^ etc. 
BR03I0F0RMUM. 
Broiiioforiii. 
CHBrj 
Official in the German Pharmacopoeia as Bromoformium. This is 
tribrommethane, being entirely analogous in composition to chloro- 
form and iodoform. 
Character.— A heavy^ transparent, colorless, mobile liquid having 
an ethereal odor and a penetrating, sweetish taste resembling chloro- 
form. 
