Section 07 PLASTICS AND ARTICLES THEREOF; RUBBER AND ARTICLES THEREOF 39 Plastics and articles thereof 39 14 ION-EXCHANGERS BASED ON POLYMERS OF 39.01 TO 39.13, IN PRIMARY FORMS 39 14 00 Ion-exchangers based on polymers of headings 39.01 to 39.13, in primary forms. Commodity Code Description 39 14 00 00 Ion-exchangers based on polymers of headings 39.01 to 39.13, in primary forms.