Polymyxin B sulfate for microbiological assay 25 mg (x1) / ,
https://www.manchesterbeacon.org/shop/rw2-y0000355-polymyxin-b-sulfate-for-microbiological-assay-25-mg-x1-309326
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This Polymyxin is guaranteed a B sulfate with the use of for and directly supplied to your lab by Gentaur's warehouse.
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