Chemical Properties
| Definition | Generic term for a series of antibiotic substances produced by strains of Bacillus polymyxa. Various polymyxins are differentiated by the letters A, B, C, D, and E. All are active against certain gram-negative bacteria. Polymyxin B is most used. |
| Appearance | All are basic polypeptides. Soluble in water; the hydrochlorides are soluble in water and methanol, insoluble in ether, acetone, chlorinated solvents, and hydrocarbons. Permissible food additives. |
| alpha | D23 -40° (c = 1.05) |
| Contact allergens | |
| Uses |