# HTS 9902.11.77: Ion-exchange resin and chelating resin with an aminophosphoric functional group, polystyrene resin with aminophosphonic acid groups (CAS No. 125935-42-4) in spherical beads with a mean particle size between 0.30 and 1.20 mm (provided for in subheading 3914.00.60)

> Plain-language tariff reference from the USITC Harmonized Tariff Schedule on [PlainTariff](https://plaintariff.com/).

## Duty rates

- **General (MFN) rate:** Free
- **Special / FTA rate:** No change
- **Column 2 rate:** No change
- **Corpus rank:** #5341 of 5979 among duty-free tariff lines

## Classification path

- **Section XXII:** [Special Classification Provisions](https://plaintariff.com/section/xxii-special-classification-provisions)
- **HTS code:** 9902.11.77

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*Source: U.S. International Trade Commission Harmonized Tariff Schedule. HTML canonical: https://plaintariff.com/heading/99021177-ion-exchange-resin-and-chelating-resin-with-an-aminophosphor*