Subheading 3913.90 · Section VII

3913.90

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

39 Plastics and articles thereof

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

3913.90 In primary forms (excluding alginic acid, its salts and esters)

Other subheadings under 3913

3913.10Alginic acid, its salts and esters, in primary forms

Source: Harmonized System 2022 edition (World Customs Organization), from the UN Comtrade classification list.