… Ion-exchangers based on polymers of headings 39.01 to 39.13, …
Explanatory notes
… 39.14 ‑ Ion-exchangers based on polymers of headings 39.01 to 39.13, … polymers, generally in granular form, containing active ionic groups (usually sulphonic, carboxylic, phenolic or … of an electrolyte, to exchange one of their own types of ions for one of those (of the same sign, positive or …