Polymeric packed column for organic SEC (GPC) analysis. Base material is styrene divinylbenzene, fulfills USP L21 requirements. Target molecular weight range: 400-10,000 Da. Shipping solvent is DMF (dimethylformamide) and cannot be used with any other solvent. 300A pore size, exclusion limit 20,000 Da. Guard column KD-G 4A recommended, part number 220-91524-09 with coupler 220-91209-08.