Acidum Aceticum Dilutum. Prepared by mixing 12 parts of the official Acetic Acid with 61 parts of water. It should contain about 6 per cent, hydrogen acetate (CH3COOH).

Properties: Color ..................................................................... Odor ..................................................................... Taste.....................................................................

Titrate 25 mils, accurately weighed, with normal KOH, V.S., using phenolthalein as indicator. Each mil of titer corresponds to 0.06003 Gm. CH3COOH.

How much of the titer did you use ?........................................................................................................................................

Then what strength is your sample of acid?............................................................................................................

Dilute Acetic Acid is used principally as an antidote for caustic alkalies. Average dose, 2 mils.

Acidum Benzoicum (C6H5.COOH). An organic acid derived from the balsamic resin of styrax.

Properties:

Appearance...........................................................................................

Solubility:

Color .............................................................

H2O ...................................................................................................

Odor ..........................................................

C2H5OH........................................................................................

Taste ........................................................

Tests for leading incompatibilities:

Sol. Ac. Benzoic.:

Sol. NaHCO3....................................................................................

FeCl3 T. S..............................................................................................

Dil. HC1 ................................................................................................

Quin. Bisulph........................................................................................

Benzoic Acid is used in making paregoric.

In medicine Benzoic Acid may be used for undue alkalinity of the urine, or in treating phosphaturia. Average dose, 0.5 Gm.

Acidum Boricum (H3BO3). Derived from the borate of soda. Properties:

Appearance................................................................................................

Solubility:

Color ...................................................................

H2O......................................................................................................

Odor ...........................................................................

C2H5OH .......................................................................................

Taste ............................................................................:..................................

C3H5(OH)8 ..............................................................................

Add NaHC03 T. S. to solution H3BO3. Result................................................................................................

Boric Acid is used in preparing the official Glyceritum Boroglycerini and Unguen-tum Acidi Borici.

The chief uses for Boric Acid are: a dusting powder in intertrigo, a valuable eye-wash (5% sol.) in conjunctivitis, a mild antiseptic in stomatitis, especially in infants.

Acidum Citricum (C6H8O7 + H2O). An organic acid ordinarily obtained from the juice of lemons and limes.

Properties:

Appearance.....................................................

Solubility:

Color .....................................................

H2O ....................,..............................................................................

Odor.............................................................

C2 H5OH ......................................................................................

Taste..............................................................................................................

Treat solution Citric Acid with NaHCO3 ,T. S. Result.........................................................................

Citric Acid is used in the preparation of Syrupus Acidi Citrici. Citric Acid is used in the specific treatment of scorbutus, and in neutralizing acid urine. Average dose, 0.5 Gm.

Acidum Hydrochloricum Dilutum. Prepared by mixing 10 Gm. HC1 with 22 Gm. distilled water.

Normal HC1 being of 32% strength, of what strength is the official dilute acid?

Properties:

Appearance................................................................................................

Odor ......................................................................................................

Color .............................................................................................................

Taste ...............................................................................................................

Carefully weigh 2 Gm. dilute HC1, add 6 Gm. distilled water, and titrate the mixture with normal KOH, V. S., using methyl orange, T. S., as indicator.

How much titer did you use ?........................................................................................................................................................

Each mil of the titer used corresponds with 0.03647 Gm. HO.

Dilute Hydrochloric Acid, in 0.5% solution, is used in the treatment of hypo-chlorhydria.

Acidum Salicylicum (C7H6O3). Orthohydroxybenzoic acid, obtained naturally from betula and gaultheria, but also made synthetically by treating phenol with sodium carbonate and carbon dioxide.

Properties:

Appearance................................................................................................

Solubility:

Color ........................................................

H2O....................................................................................................

Odor ......................................................

C2H5OH..........................................................................................

Taste.................................................................

Leading tests for incompatibilities: Add a small crystal of salicylic acid to the following:

Spir. AEtheris Nitrosi ..................................................................

Sod. Phosph..........................................................................................

FeCl3 T. S..............................................................................................

Citric Acid ........................................................

Quin. Bisulph. T. S.........................................................................

Salicylic Acid is used principally in the treatment of acute rheumatism, though the salts of the acid are more frequently employed. Average dose, 0.75 Gm.

Acidum Tannicum (HC14H9O9). Usually obtained from nutgalls; also widely found in many vegetable substances.

Properties:

Appearance................................................................................................

Solubility:

Color ................................................................

H2O.....................................................................................................

Odor .................................................................

C2H5OH.......................................................................................

Taste ...............................................................

C3H5 (OH)3................................................................................

Incompatibility tests: Add Tannic Acid T. S. to the following:

Egg Albumin Sol...............................................................................

FeCl3 T. S..............................................................................................

Any alkaloid......................................................

Spir. AEtheris Nitrosi ..................................................................

CuS04 T. S...........................................................................................

Starch T. S..............................................................................................

Do not triturate Tannic Acid with potassium chlorate. Why?......................................................

The Glycerite, Troche, and Unguent are official preparations. Tannic Acid is used for its local astringent effect; but the desired effect is better produced by using some substance, like kino for example, containing tannin.

Acids Used As Medicines 2