# HTS 2921.45.20.00: 3-Amino-2,7-naphthalenedisulfonic acid; 4-Amino-1-naphthalenesulfonic acid, sodium salt; 5-Amino-1-naphthalenesulfonic acid (Laurent's acid); 8-Amino-2-naphthalenesulfonic acid and its salts; 7-Amino-1,3,6-naphthalenetrisulfonic acid; 8-Anilino-1-naphthalenesulfonic acid (Phenyl Peri acid) and its salts; andN-Ethyl-1-naphthylamine

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

## Duty rates

- **General (MFN) rate:** 5.8%
- **Special / FTA rate:** Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,L,MA,OM,P,PA,PE,S,SG)
- **Column 2 rate:** 15.4¢/kg + 39.5%
- **Corpus rank:** #3158 of 6827 among dutiable tariff lines
- **Percentile among ad-valorem lines:** 76th of 13,544 rated 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:** 2921.45.20.00

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

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*Source: U.S. International Trade Commission Harmonized Tariff Schedule. HTML canonical: https://plaintariff.com/heading/2921452000-3-amino-27-naphthalenedisulfonic-acid-4-amino-1-naphthalen*