As nouns the difference between castoreum and castorin
is that castoreum is the bitter exudate of the castor sacs of mature beavers while castorin is a white crystalline substance obtained from castoreum.
castoreum
Alternative forms
* castorium
Noun
(-)
The bitter exudate of the castor sacs of mature beavers.
castorin
English
Noun
(
-)
(organic compound) A white crystalline substance obtained from castoreum.
(
Webster 1913)