Stability and Storage Conditions
Empirical Formula and Molecular Weight
Gelatin is a generic term for a mixture of purified protein fractions
obtained either by partial acid hydrolysis (type A gelatin) or by
partial alkaline hydrolysis (type B gelatin) of animal collagen
obtained from cattle and pig bone, cattle skin (hide), pigskin, and
fish skin. Gelatin may also be a mixture of both types.
The protein fractions consist almost entirely of amino acids
joined together by amide linkages to form linear polymers, varying
in molecular weight from 20 000–200 000.
The JP XV also includes a monograph for purified gelatin.