27 
forming clear, yellow-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 C 6 H 4 (OH)CO, 2 BiO. The 
U. 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 salicylic 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: Airol (bismuth oxyiodo- 
subgallate). bismal (bismuth methylene digallate). bismutol (“bismuth 
sodium phosphate salicylate "), crurin (quinolin bismuth sulphocya- 
nate), eudoxin (bismuth tetraiodo-plienolphthalein), iodogallicin (bis- 
muth oxyiodide methyl-gallol), orjpJtol (bismuth betanaphthol), other 
phenolates. the benzoate, the chrysophanate ( dermal ), the cinnamylate 
(, hetoform ), the cresolate, the lactate, the bilactomonotannate ( [lactanine ). 
the phenolsulphonate. the tannate, and similar salts: also proteid 
compounds, as the peptonate; compounds with resorcin, pyrogallol 
( helc-osol ), etc. 
BROMOFORMUM. 
Bromoform. 
CHBr 3 
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. 
