3913 Natural polymers (e.g. alginic acid) and modified natural polymers (e.g. hardened proteins, chemical derivatives of natural rubber), n.e.c. or included, in primary forms

3913.10 Polymers, natural; alginic acid, its salts and esters, in primary forms

• 3913.10.00.20 Sodium alginate extracted from brown seaweed, with: a loss on drying of not more than 15 % by weight (4h at 105 °C); a water-insoluble fraction of not more than 2 % by weight, calculated on the dry weight5%
• 3913.10.00.90 Other5%

3913.90 Polymers, natural and modified natural; in primary forms (excluding alginic acid, its salts and esters)

• 3913.90.00.20 Poly(hydroxyalkanoate), predominantly consisting of poly(3-hydroxybutyrate)6.5%
• 3913.90.00.40 Xanthan gum6.5%
• Sodium hyaluronate
• 3913.90.00.85 Sterile sodium hyaluronate (CAS RN 9067-32-7)6.5%
• Non sterile
• 3913.90.00.87 With: a weight average molecular weight (Mw) of not more than 900 000; an endotoxin level of not more than 0,008 Endotoxin units (EU)/mg; an ethanol content of not more than 1% by weight; an isopropanol content of not more than 0,5% by weight6.5%
• 3913.90.00.88 Other6.5%
• 3913.90.00.95 Chondroitinsulphuric acid, sodium salt (CAS RN 9082-07-9)6.5%
• 3913.90.00.99 OtherFree