Cellulose powder - packing material, adsorbents for column chromatography. Native fibrous cellulose, purified grade (washed with different eluents), average degree of polymerization 620–680, fiber length (85 %) 20–75 μm, specific surface acc. to Blaine ~ 5500 cm²/g residue on ignition < 1000 ppm, < 2 ppm Fe, < 1 ppm Cu, < 2 ppm P, dichloromethane extract < 0.15 %