Polymyxin B

Molecular Formula: C56H98N16O13
CAS Number: 1405-20-5
Appearance: Colorless To Yellow Solid

Polymyxin B is an antibiotic primarily used for resistant Gram-negative infections. It is derived from the bacterium Bacillus polymyxa. Polymyxin B is composed of a number of related compounds. It has a bactericidal action against almost all Gram-negative bacilli except the Proteus and Neisseria genera.