# United States tariff line 2931.59.00.25: O-Pinacolyl methylphosphonochloridate

> In the United States tariff, line 2931.59.00.25 covers halogenated organo-phosphorous derivatives, O-Pinacolyl methylphosphonochloridate. The general (MFN) duty rate is 3.7%. It falls under HS subheading 2931.59 in heading 29.31 (chapter 29).

Source: https://border.bot/countries/united-states/hs-codes/2931590025
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) / [2931.59](https://border.bot/countries/united-states/hs-codes/293159) / [2931.59.00.25](https://border.bot/countries/united-states/hs-codes/2931590025)

## Key facts

- Tariff line: 2931.59.00.25
- Covers: Halogenated organo-phosphorous derivatives, O-Pinacolyl methylphosphonochloridate
- Duty (MFN): 3.7%
- 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: [2931.59](https://border.bot/hs-codes/293159)

## What this line covers

In the United States tariff, line 2931.59.00.25 covers halogenated organo-phosphorous derivatives, O-Pinacolyl methylphosphonochloridate.

Its legal text is “O-Pinacolyl methylphosphonochloridate”, read under “Halogenated organo-phosphorous derivatives” and “Other”.

## How it is structured

It falls under HS subheading 2931.59 in heading 29.31 (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 29.31: Other organo-inorganic compounds
- Subheading 2931.59: Halogenated organo-phosphorous derivatives
- Within the subheading: Other
- Line 2931.59.00.25: O-Pinacolyl methylphosphonochloridate

## Duty

The general (MFN) duty rate is 3.7%.

The rate is published on 2931.59.00.

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 2931.59 yet.

- [The Harmonized System text for 2931.59](https://border.bot/hs-codes/293159)

## Other lines under 2931.59

- [2931.59.00.10](https://border.bot/countries/united-states/hs-codes/2931590010) O-Alkyl (≤ C10, including cycloalkyl) alkyl (methyl, ethyl,n- propyl or isopropyl) phosphonofluoridates
- [2931.59.00.15](https://border.bot/countries/united-states/hs-codes/2931590015) Alkyl (methyl, ethyl, n-propyl or isopropyl) phosphonyl difluorides
- [2931.59.00.20](https://border.bot/countries/united-states/hs-codes/2931590020) O-Isopropyl methylphosphonochloridate
- [2931.59.00.30](https://border.bot/countries/united-states/hs-codes/2931590030) P-Alkyl (≤ C10, incl. cycloalkyl) N-(1-(dialkyl (≤ C10, incl. cycloalkyl) amino))alkylidene (H or ≤C10, incl. cycloalkyl) phosphonamidic fluorides and corresponding alkylated or protonated salts
- [2931.59.00.35](https://border.bot/countries/united-states/hs-codes/2931590035) Methyl- bis(diethylamino)methylene)phosphonamidofluoridate
- [2931.59.00.60](https://border.bot/countries/united-states/hs-codes/2931590060) Containing a phosphorus atom to which one methyl, ethyl, n-propyl or isopropyl group is bonded but no further carbon atoms
- [2931.59.00.80](https://border.bot/countries/united-states/hs-codes/2931590080) Other

- Previous line: [2931.59.00.20](https://border.bot/countries/united-states/hs-codes/2931590020) O-Isopropyl methylphosphonochloridate
- Next line: [2931.59.00.30](https://border.bot/countries/united-states/hs-codes/2931590030) P-Alkyl (≤ C10, incl. cycloalkyl) N-(1-(dialkyl (≤ C10, incl. cycloalkyl) amino))alkylidene (H or ≤C10, incl. cycloalkyl) phosphonamidic fluorides and corresponding alkylated or protonated salts

## Frequently asked questions

### What does tariff line 2931.59.00.25 cover in the United States tariff?

In the United States tariff, line 2931.59.00.25 covers halogenated organo-phosphorous derivatives, O-Pinacolyl methylphosphonochloridate.

### What is the general (MFN) duty on 2931.59.00.25 in the United States?

The general (MFN) duty rate is 3.7%. The rate is published on 2931.59.00.

### Which preferential rates apply to 2931.59.00.25?

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/2931590025.json