Adeps, or Lard, is the purified internal fat taken from the abdomen of the hog (Sus scrofa).

Properties:

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

Solubility:

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

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

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

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

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

(C2H5)2O ....................................................................................

Melting Point..........................................................................................

CHCI3 ................................................................................................

Prepare the official Adeps Benzoinatus by thoroughly mixing o. 1 Gm. coarsely powdered siam benzoin with 50 Gm. lard. Heat the mixture for 2 hours over a water bath at a temperature not exceeding 6o° C, keeping container covered, but stirring the mixture frequently. Strain through muslin, and stir occasionally until it cools.

In separate dishes of equal diameter place an equal amount of lard and of ben-zoinated lard. Label and set aside on a shelf exposed to light and air. At each subsequent period examine for possible variations in physical properties.

Lard:

Benzoinated Lard

1 week......................................................................................................

1 week......................................................................................................

2 weeks...................................................................................................

2 weeks ...................................................................................................

3 weeks ..................................................................................................

3 weeks...................................................................................................

4 weeks ...................................................................................................

4 weeks...................................................................................................

Adeps Lanae, or Wool Fat, is a purified fat, freed from water, derived from the wool of sheep (Ovis aries).

Properties:

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

Solubility:

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

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

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

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

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

(C2H5) 2O ....................................................................................

CHCl3 ................................................................................................

Relative cohesiveness compared with Adeps............................................................................................................

Relative absorbability compared with Adeps............................................................................................................

Relative permanence in air compared with Adeps.............................................................................................

Adeps Lanae Hydrosus = Adeps Lanae + about 28% water.

These several fats are used as bases for the preparation of ointments.

Aconite In. Flower (Aconituin Nopellus).

By permission of Burroughs Wellcome Co.

Aconite In. Flower (Aconituin Nopellus).