Section 07 Plastics and articles thereof; rubber and articles thereof 39 Plastics and articles thereof 39 13 Natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms. 39 13 10 Alginic acid, its salts and esters Commodity Code Description 39 13 10 00 Alginic acid, its salts and esters
