Page 373 - Pharmacognosy 2 PG303 (1)

Pharmacognosy-2 (PG303) Level 2 Clinical Pharmacy-Pharm D

Wool Fat (Lanolin)

It is an anhydrous fat prepared from the wool of sheep, Ovis aries (Bovidae).

Properties: Pale yellow tenacious material with faint characteristic
odor.
Insoluble in water but can incorporate it.

Test of identity Dissolve 1 g of the fat in 3 ml acetic anhydride + 0.3
ml H2SO4 → pink → green → blue color.
(Cholesterol):

Constituents: • Steroids: Cholestrol, Isocholestrol
• Unstaurated C 27 alcohol, free or esterified with:
Lanoceric acid
Lanopalmitic acid
Carnaubic acid
Other fatty acids
Uses: ▪ Emollient base for creams and ointments.
▪ It is also used as a raw material for producing
vitamin D3.

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