# United States tariff lines under HS 2908.99

> The United States tariff splits HS 2908.99 (other: Other) into 11 national lines: 2908.99.03.00 (2,5-Dihydroxybenzenesulfonic acid, potassium salt; 3,6-Dihydroxy-2,7-naphthalenedisulfonic acid; 3,6-Dihydroxy-2,7-naphthalenedisulfonic acid, sodium salt; 4-Hydroxy-1-naphthalenesulfonic acid, sodium salt; 1-Naphthol-3,6-disulfonic acid; and 2-Naphthol-3,6-disulfonic acid and its salts), 2908.99.06.00 (4-Hydroxy-1-naphthalenesulfonic acid (1-Naphthol-4-sulfonic acid)), 2908.99.09.00 (1,8-Dihydroxynaphthalene-3,6-disulfonic acid and its disodium salt), 2908.99.12.00 (products described in additional U.S. note 3 to section VI) and 7 others.

Source: https://border.bot/countries/united-states/hs-codes/290899
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 29](https://border.bot/countries/united-states/hs-codes/29) / [2908.99](https://border.bot/countries/united-states/hs-codes/290899)

## Key facts

- HS subheading: [2908.99](https://border.bot/hs-codes/290899)
- National lines: 11
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 29: Organic chemicals

## United States lines under 2908.99

The United States tariff splits HS 2908.99 (other: Other) into 11 national lines: 2908.99.03.00 (2,5-Dihydroxybenzenesulfonic acid, potassium salt; 3,6-Dihydroxy-2,7-naphthalenedisulfonic acid; 3,6-Dihydroxy-2,7-naphthalenedisulfonic acid, sodium salt; 4-Hydroxy-1-naphthalenesulfonic acid, sodium salt; 1-Naphthol-3,6-disulfonic acid; and 2-Naphthol-3,6-disulfonic acid and its salts), 2908.99.06.00 (4-Hydroxy-1-naphthalenesulfonic acid (1-Naphthol-4-sulfonic acid)), 2908.99.09.00 (1,8-Dihydroxynaphthalene-3,6-disulfonic acid and its disodium salt), 2908.99.12.00 (products described in additional U.S. note 3 to section VI) and 7 others.

- [2908.99.03.00](https://border.bot/countries/united-states/hs-codes/2908990300) Other, Other, Derivatives containing only sulfo groups, their salts and esters, 2,5-Dihydroxybenzenesulfonic acid, potassium salt; 3,6-Dihydroxy-2,7-naphthalenedisulfonic acid; 3,6-Dihydroxy-2,7-naphthalenedisulfonic acid, sodium salt; 4-Hydroxy-1-naphthalenesulfonic acid, sodium salt; 1-Naphthol-3,6-disulfonic acid; and 2-Naphthol-3,6-disulfonic acid and its salts. Duty (MFN): 5.5%
- [2908.99.06.00](https://border.bot/countries/united-states/hs-codes/2908990600) Other, Other, Derivatives containing only sulfo groups, their salts and esters, 4-Hydroxy-1-naphthalenesulfonic acid (1-Naphthol-4-sulfonic acid). Duty (MFN): free
- [2908.99.09.00](https://border.bot/countries/united-states/hs-codes/2908990900) Other, Other, Derivatives containing only sulfo groups, their salts and esters, 1,8-Dihydroxynaphthalene-3,6-disulfonic acid and its disodium salt. Duty (MFN): 5.5%
- [2908.99.12.00](https://border.bot/countries/united-states/hs-codes/2908991200) Other, Other, Derivatives containing only sulfo groups, their salts and esters, Other, Products described in additional U.S. note 3 to section VI. Duty (MFN): 5.5%
- [2908.99.15.00](https://border.bot/countries/united-states/hs-codes/2908991500) Other, Other, Derivatives containing only sulfo groups, their salts and esters, Other, Other. Duty (MFN): 5.5%
- [2908.99.20.00](https://border.bot/countries/united-states/hs-codes/2908992000) Other, Other, Other, p-Nitrophenol. Duty (MFN): 5.5%
- [2908.99.25.00](https://border.bot/countries/united-states/hs-codes/2908992500) Other, Other, Other, Other nitrophenols. Duty (MFN): 5.5%
- [2908.99.33.00](https://border.bot/countries/united-states/hs-codes/2908993300) Other, Other, Other, Dinitro-o-cresols (other than 4,6-dinitro-o-cresol) and 4-nitro-m-cresol. Duty (MFN): 5.5%
- [2908.99.40.00](https://border.bot/countries/united-states/hs-codes/2908994000) Other, Other, Other, Dinitrobutylphenol and its salts. Duty (MFN): 5.5%
- [2908.99.80.00](https://border.bot/countries/united-states/hs-codes/2908998000) Other, Other, Other, Other, Products described in additional U.S. note 3 to section VI. Duty (MFN): 5.5%
- [2908.99.90.00](https://border.bot/countries/united-states/hs-codes/2908999000) Other, Other, Other, Other, Other. Duty (MFN): 5.5%

## In other countries

No other national tariff on border.bot has live lines under 2908.99 yet.

- [The Harmonized System text for 2908.99](https://border.bot/hs-codes/290899)

- Previous subheading: [2908.92](https://border.bot/countries/united-states/hs-codes/290892) Halogenated, sulfonated, nitrated or nitrosated derivatives of phenols or phenol-alcohols
- Next subheading: [2909.11](https://border.bot/countries/united-states/hs-codes/290911) Ethers, ether-alcohols, ether-phenols, ether-alcohol- phenols, alcohol peroxides, ether peroxides, acetal and hemiacetal peroxides, ketone peroxides (whether or not chemically defined), and their halogenated, sulfonated, nitrated or nitrosated derivatives

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 2908.99?

The United States tariff splits HS 2908.99 (other: Other) into 11 national lines: 2908.99.03.00 (2,5-Dihydroxybenzenesulfonic acid, potassium salt; 3,6-Dihydroxy-2,7-naphthalenedisulfonic acid; 3,6-Dihydroxy-2,7-naphthalenedisulfonic acid, sodium salt; 4-Hydroxy-1-naphthalenesulfonic acid, sodium salt; 1-Naphthol-3,6-disulfonic acid; and 2-Naphthol-3,6-disulfonic acid and its salts), 2908.99.06.00 (4-Hydroxy-1-naphthalenesulfonic acid (1-Naphthol-4-sulfonic acid)), 2908.99.09.00 (1,8-Dihydroxynaphthalene-3,6-disulfonic acid and its disodium salt), 2908.99.12.00 (products described in additional U.S. note 3 to section VI) and 7 others.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/290899.json