From Chapter 39: Chapter 39
| HTS Code | Description | General Duty |
|---|---|---|
| 3914002000 | Ion-exchangers based on polymers of headings 3901 to 3913, in primary forms Cross-linked polyvinylbenzyltrimethylammonium chloride (Cholestyramine resin USP) | Free |
| 3914006000 | Ion-exchangers based on polymers of headings 3901 to 3913, in primary forms Other | 3.9% |