Cellulose MN 301: native fibrous cellulose, standard grade, fiber length (95 %) 2–20 μm, average degree of polymerization 400–500, specific surface acc. to Blaine 15000 cm2/g ≤ 20 ppm Fe, 6 ppm Cu, 7 ppm P, CH2Cl2 extract ≤ 0,25 %, residue on ignition at 850 °C ≤ 1500 ppm