# HTS 2921.59.17.00: 4,4'-Benzidine-2,2'-disulfonic acid; 1,4-Diaminobenzene-2-sulfonic acid; 4,4'-Methylene bis ((3-chloro-2,6-diethylaniline); 4,4'-Methylene bis(2,6-diethylaniline); 4,4'-Methylene bis (2,6-diisopropylaniline);m-Xylene diamine; and 3,3'-Diaminobenzidine (tetraaminobiphenyl)

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

## Duty rates

- **General (MFN) rate:** Free
- **Column 2 rate:** 15.4¢/kg + 60%
- **Corpus rank:** #954 of 5979 among duty-free tariff lines

## Classification path

- **Section VI:** [Products of the Chemical or Allied Industries](https://plaintariff.com/section/vi-products-of-the-chemical-or-allied-industries)
- **Chapter 29:** [Organic chemicals](https://plaintariff.com/chapter/chapter-29-organic-chemicals)
- **HTS code:** 2921.59.17.00

## Related tools

- [Tariff calculator](https://plaintariff.com/tools/tariff-calculator)
- [Search HTS codes](https://plaintariff.com/search)
- [Methodology & sources](https://plaintariff.com/methodology)

---

*Source: U.S. International Trade Commission Harmonized Tariff Schedule. HTML canonical: https://plaintariff.com/heading/2921591700-44-benzidine-22-disulfonic-acid-14-diaminobenzene-2-su*