# United States tariff line 2918.29.22.00: p-Hydroxybenzoic acid

> In the United States tariff, line 2918.29.22.00 covers carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives, p-Hydroxybenzoic acid. The general (MFN) duty rate is 6.5%. It falls under HS subheading 2918.29 in heading 29.18 (chapter 29).

Source: https://border.bot/countries/united-states/hs-codes/2918292200
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) / [2918.29](https://border.bot/countries/united-states/hs-codes/291829) / [2918.29.22.00](https://border.bot/countries/united-states/hs-codes/2918292200)

## Key facts

- Tariff line: 2918.29.22.00
- Covers: Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives, p-Hydroxybenzoic acid
- Duty (MFN): 6.5%
- Preferential rates: From free (17 programmes or origins)
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [2918.29](https://border.bot/hs-codes/291829)

## What this line covers

In the United States tariff, line 2918.29.22.00 covers carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives, p-Hydroxybenzoic acid.

Its legal text is “p-Hydroxybenzoic acid”, read under “Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives” and “Other”.

Products commonly classified here include 4-Hydroxybenzoic acid (CAS No. 99-96-7) (border.bot’s search keywords, not legal text).

## How it is structured

It falls under HS subheading 2918.29 in heading 29.18 (chapter 29). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- Chapter 29: Organic chemicals
- Heading 29.18: Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulfonated, nitrated or nitrosated derivatives
- Subheading 2918.29: Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives
- Within the subheading: Other
- Line 2918.29.22.00: p-Hydroxybenzoic acid

## Duty

The general (MFN) duty rate is 6.5%.

Duty-free entry applies to goods that qualify under 16 programmes, and to goods from a group of origins (origin group A).

- Free: a group of origins (origin group A) (A)
- Free: United States-Australia Free Trade Agreement (AU)
- Free: United States-Bahrain Free Trade Agreement Implementation Act (BH)
- Free: United States-Chile Free Trade Agreement (CL)
- Free: United States-Colombia Trade Promotion Agreement Implementation Act (CO)
- Free: African Growth and Opportunity Act (D)
- Free: Caribbean Basin Economic Recovery Act (E)
- Free: United States-Israel Free Trade Area (IL)
- Free: United States-Jordan Free Trade Area Implementation Act (JO)
- Free: United States-Korea Free Trade Agreement Implementation Act (KR)
- Free: United States-Morocco Free Trade Agreement Implementation Act (MA)
- Free: United States-Oman Free Trade Agreement Implementation Act (OM)
- Free: Dominican Republic-Central America-United States Free Trade Agreement (P)
- Free: United States-Panama Trade Promotion Agreement Implementation Act (PA)
- Free: United States-Peru Trade Promotion Agreement Implementation Act (PE)
- Free: United States-Mexico-Canada Agreement (S)
- Free: United States-Singapore Free Trade Agreement (SG)

## In other countries

No other national tariff on border.bot has live lines under 2918.29 yet.

- [The Harmonized System text for 2918.29](https://border.bot/hs-codes/291829)

## Other lines under 2918.29

- [2918.29.04.00](https://border.bot/countries/united-states/hs-codes/2918290400) 2,3-Cresotic acid; 2-Hydroxybenzoic acid, calcium salt; 1-Hydroxy-2-naphthoic acid; 2-Hydroxy-1-naphthoic acid; 1-Hydroxy-2-naphthoic acid, phenyl ester;α-Resorcylic acid;γ-Resorcylic acid; and 5-Sulfosalicylic acid
- [2918.29.06.00](https://border.bot/countries/united-states/hs-codes/2918290600) 1,6-Hexanediol bis(3,5-dibutyl-4-hydroxyphenyl)propionate)
- [2918.29.08.00](https://border.bot/countries/united-states/hs-codes/2918290800) m-Hydroxybenzoic acid
- [2918.29.20.00](https://border.bot/countries/united-states/hs-codes/2918292000) Gentisic acid; and Hydroxycinnamic acid and its salts
- [2918.29.25.00](https://border.bot/countries/united-states/hs-codes/2918292500) 3-Hydroxy-2-naphthoic acid
- [2918.29.30.00](https://border.bot/countries/united-states/hs-codes/2918293000) Gallic acid
- [2918.29.39.00](https://border.bot/countries/united-states/hs-codes/2918293900) 4,4-Bis(4-hydroxyphenyl) pentanoic acid; and 3,5,6-Trichlorosalicylic acid
- [2918.29.65.00](https://border.bot/countries/united-states/hs-codes/2918296500) Products described in additional U.S. note 3 to section VI
- [2918.29.75.00](https://border.bot/countries/united-states/hs-codes/2918297500) Other

- Previous line: [2918.29.20.00](https://border.bot/countries/united-states/hs-codes/2918292000) Gentisic acid; and Hydroxycinnamic acid and its salts
- Next line: [2918.29.25.00](https://border.bot/countries/united-states/hs-codes/2918292500) 3-Hydroxy-2-naphthoic acid

## Frequently asked questions

### What does tariff line 2918.29.22.00 cover in the United States tariff?

In the United States tariff, line 2918.29.22.00 covers carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives, p-Hydroxybenzoic acid.

### What is the general (MFN) duty on 2918.29.22.00 in the United States?

The general (MFN) duty rate is 6.5%.

### Which preferential rates apply to 2918.29.22.00?

Duty-free entry applies to goods that qualify under 16 programmes: the United States-Australia Free Trade Agreement, the United States-Bahrain Free Trade Agreement Implementation Act, the United States-Chile Free Trade Agreement, the United States-Colombia Trade Promotion Agreement Implementation Act, African Growth and Opportunity Act, Caribbean Basin Economic Recovery Act, the United States-Israel Free Trade Area, the United States-Jordan Free Trade Area Implementation Act, the United States-Korea Free Trade Agreement Implementation Act, the United States-Morocco Free Trade Agreement Implementation Act, the United States-Oman Free Trade Agreement Implementation Act, the Dominican Republic-Central America-United States Free Trade Agreement, the United States-Panama Trade Promotion Agreement Implementation Act, the United States-Peru Trade Promotion Agreement Implementation Act, the United States-Mexico-Canada Agreement and the United States-Singapore Free Trade Agreement, and to goods from a group of origins (origin group A).

## 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/2918292200.json