Appearance:White powderClarity and Color:Passes TestHeavy Metals:Passes TestpH:7.4 (BP), 8.0 (USP)Optical Rotation:[a] = -49°Loss on Drying:0.80%Sulfated Ash:21%Assay:12,892 U/mg, 408 ug/mgPyrogen:Passes Test:Total sulphite:As reportedIdentification: As reportedFree colistin:As reportedSterility:As reportedUndue Toxicity:As reportedStorage and Stability:Lyophilized powder may be stored at -20°C. Stable for 12 months after receipt at 4°C. Reconstitute with sterile ddH2O. Aliquot to avoid repeated freezing and thawing. Store at 4°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.
