High purity Carboxymethyl Cellulose 4M for use in research, biochemical enzyme assays and in vitro diagnostic analysis. 

Carboxymethylated (DS ~ 0.4), medium viscosity cellulose. Recommended substrate for the assay of cellulases by reducing sugar methods. For most endo-cellulases, this is a much more sensitive substrate than CMC-7M (DS = 0.7).