WCO Trade Tools provides essential information to support your trade activity.
Harmonized System
Section VII > Chapter 39 > Heading 3912 > 3912.20
Cellulose nitrates (including collodions)
Section VII > Chapter 39 > Heading 3912 > 3912.3 > 3912.31
Carboxymethylcellulose and its salts
Section VII > Chapter 39 > Heading 3913
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.
Section VII > Chapter 39 > Heading 3913 > 3913.10
Alginic acid, its salts and esters
Section VII > Chapter 39 > Heading 3914
Ion-exchangers based on polymers of headings 39.01 to 39.13, in primary forms.
Section VII > Chapter 39 > Heading 3914 > 3914.00
Ion-exchangers based on polymers of headings 39.01 to 39.13, in primary forms