368 ACIDS 



ACIDUM SULPHUROSUM — SULPHUROUS ACID 



This is a solution containing at least 6 per cent, of sulphur dioxide. 

 Dose. H. 3 ij— viij; 8—30. D. TTl v— xv; 0.33—1. It is pre- 

 pared by allowing sulphuric acid to act upon charcoal, the resulting 

 sulphur dioxide being dissolved in water. It should be kept well 

 corked in amber bottles. 



Action and Uses. It is used as a disinfectant and parasiticide 

 in skin diseases and for gastric fermentation. This acid is also 

 formed by burning sulphur in the presence of moisture and is used 

 in this manner as a favorite method of fumigating stables, etc. 



ACIDUM ACETICUM — ACETIC ACID 



Acetic acid is a liquid containing from 36 to 37 per cent, by 

 weight of absolute acetic acid. It corresponds very closely to the 

 :#:8 of commerce. It occurs as a clear colorless liquid, of strongly 

 characteristic vinegar-like odor and sharply acid taste. 



Preparations. Acidum Aceticum Olaciale. 



Glacial Acetic acid contains 99 per cent, by weight of absolute 

 acetic acid. 



Acidum Aceticum Dilutum. Diluted acetic acid must contain 

 not less than 5.1 per cent, nor more than 6.3 per cent, of absolute 

 acetic acid. 



Doses. H. § j— ij ; 30.-60. D. 3 ss— j ; 2.-4. 



Action and Uses. 



1. Glacial acetic acid is used as a caustic to remove warts. 



* ACIDUM PYROLIGNOSUM — PYROLIGNEOUS ACID 



Synonym. Wood Vinegar 



This is prepared by the destructive distillation of wood. It con- 

 tains from 5 to 7 per cent, of acetic acid, some methyl alcohol, acetone 

 and tar. 



Action and Uses. Used externally to combine the effects of 

 acetic acid and tar. 



Acetum. Vinegar is an impure form of diluted acetic acid con- 

 taining from 4 to 7 per cent, of acetic acid prepared by the fermenta- 

 tion of cider or wine. 



ACIDUM CITRICUM — CITRIC ACID 



Properties. Colorless translucent crystals or white powder, odor- 

 less acid taste, efflorescent in warm air. 



Citric acid is widely distributed throughout the vegetable king- 

 * Unofficial. 



