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236941 Colistin methanesulfonate sodium salt CAS:

Specifications
Grade
Reagent Grade
Molecular Formula
C58H115N16Na5O28S5
Molecular Weight
1759.9
EU Commodity Code
38220090
Shipping Temp
RT
Storage Temp
4°C

Appearance
White powder
Clarity and Color
Passes Test
Heavy Metals
Passes Test
pH
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/mg
Passes Test
Undue Toxicity
As reported As reported As reported As reported As reported
Storage 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.
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