Cod-liver Oil

Name:
Cod-liver Oil
Detailed information:

Chemistry name:	morrhua oil
Properties:
Pale-yellow, viscous liquid; fixed, nondrying oil; slightly fishy odor and taste. D 0.918–0.927, saponification number 180–192, iodine number 145–180, maumene test 102–113,acid value 204–207. Soluble in ether, chloroform, ethyl acetate, and carbon disulfide; slightly soluble in alcohol Combustible.
Chief Constituents:
Glycerides of palmitic and stearic acids, cholesterol, butyl alcohol esters, etc.
Derivation:
From the livers of codfish (Gadus morrhua) and other species of Galidae. These are rendered by steam heat, and the oil separated and chilled until the stearin solidifies; thenit is pressed and the clear oil collected.
Method of Purification:
Filtration.
Grade:
Pale, light brown, dark brown, NF.
Use:
Medicine (for its vitamin A and D content, now largely is replaced by synthetic products), chamois-leather tanning.