Corn steep liquor is a by-product of corn wet-milling.[1] A viscous concentrate of corn solubles which contains amino acids, vitamins and minerals,[2] it is an important constituent of some growth media. It was used in the culturing of Penicillium during research into penicillin by American microbiologist Andrew J. Moyer.[3] It is an excellent source of organic nitrogen.[4]
Corn steep liquor has CAS number 66071-94-1 and EC Number 266-113-4.[2]