266 INORGANIC AGENTS 



AciDUM AcETiouM. Acetic Acid. H G,B.fi,. 



(U. S. & B. P.) 



Synonym. — Acetum purum, — acetum destillatum, P.G.; 

 acide acetique dilue, Fr.; reiner essig, G. 



A liquid composed of 36 per cent., by weight, of absolute 

 acetic acid, and 64 per cent, of water. 



Derivation. — Distillation of dry sodium acetate with, 

 sulphuric acid and crystallization of the distillate. Na Cj 

 H3O, + H, SO, = H C, H3 O, + Na H SO,. 



Properties. — A clear, colorless liquid, having a strong, 

 vinegar-like odor, a purely acid taste and a strongly acid 

 reaction. Spec. gr. about 1.048. Miscible with water or 

 xilcohol in all proportions. 



PBEPARA.T10N. 

 ^cidu7n Aceticum Dilutum. Diluted Acetic Acid. (U. S. & B. P.) 



Synonym, — Acetum concentratum, — acide acetique, Fr.; ver- 

 'dtinnte essigsaure, G. 



Derivation. — ^ Acetic acid, 100; distilled water, 500. Diluted acetic 

 ^acid contains 6 per cent., by weight, of absolute acetic acid. Spec. gr. 

 ■about 1 008. Not employed internally except in the form of ofl&cial 

 aceta. Vinegar is impure diluted acetic acid, made by destructive 

 distillation of wood, or by acetous ferm.entation and oxidation of alco- 

 holic solutions, as cider. 



C^HbO H -J- O2 = H CjHaOi + HjO. A temperature of 80° F., and 

 the presence of the ferment or mould (Mycoderma aceti), are necessary. 



AciDUM Aceticum Glaciale. Glacial Acetic Acid. H CjHjOj. 

 (U. S. & B. P.) 



Synonym. — Acidum aceticum, P. G.; acidum aceticum 

 concentratum, acetum glaciale, — acide acetique concentree, 

 esprit de vinaigre, vinaigre glacial, Fr.; essigsaure, eissesig, G. 



Derivation. — Same as acetic acid. 



Properties. — A clear, colorless liquid of a strong vinegar- 

 like odor, and a very pungent, purely acid taste. Contains 

 about 99 per cent, of absolute acid. Not used internally. 



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