HTS Code · Chapter 29 · Updated Nov 9, 2026

2931.59.00.25O-Pinacolyl methylphosphonochloridate

Also written 2931590025 and 2931.59.0025

HTS Code 2931.59.00.25 covers any article best defined as Products of the Chemical or Allied IndustriesOrganic chemicalsOther organo-inorganic compounds:Halogenated organo-phosphorous derivatives:OtherO-Pinacolyl methylphosphonochloridate in the Harmonized Tariff Schedule.

As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from China pay 16.2% in duties: the 3.7% base rate plus Section 301 – Forced Labor (12.5%).

From China, the total duty on 2931.59.00.25 last changed on Jul 24, 2026, from 13.7% to 16.2%. It has changed 2 times since Nov 17, 2025.

Estimated Duty on 2931.59.00.25

$10,000.00 by ocean, entered Nov 9, 2026

Country of origin

China

Total duty: 16.2%; $1,620.00 on this shipment
Fees: 0.47%; MPF + HMF · $47.14
Duty + fees: 16.67%; Payable to CBP
Landed cost: $11,667.14; On $10,000.00 customs value

Base duty3.7%
Section 301 – Forced Labor12.5%
Customs fees0.47%

Chapter 99 lines9903.05.31 Section 301 Forced Labor – China

6 exemptions could lower this

So could Pharmaceutical products and related appendix. Check them against your real shipment details.

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Base Duty Rates for 2931.59.00.25

Set at 2931.59.00 in the Harmonized Tariff Schedule

General Rate of Duty: 3.7%
Special Rate of Duty: Free; AAUBHCLCODEILJOKKRMAOMPPAPESSG
Column 2 (Non-NTR): 25%
Units of Quantity: kg

Total duty by countryAll 20 →

China16.2%
Mexico13.7%
Canada13.7%
Vietnam16.2%
Germany10%

Tariff updates

Recent US tariff actions that name 2931.59.00.25 or its heading.

Oct 16, 2026 · CBP guidanceCBP issues HSU 2625 with Section 232 pharmaceutical updates and CPSC flag changes
Jul 21, 2026 · CBP guidanceUSTR imposes 25% Section 301 tariff on goods of Brazil, with exemptions, from July 22, 2026
Dec 18, 2025 · PublishedUS cuts reciprocal tariff on Swiss and Liechtenstein goods to 15% all-in, exempts certain products

All tariff updates

Top origins · US imports 2025

Top Origins: Countries the US Imports HTS 2931.59.00.25 From

In 2025 the US imported $12M of o-pinacolyl methylphosphonochloridate (HTS 2931.59.00 and related codes), down 23% on 2024, mostly from China (89%), Canada (8%) and Switzerland (1%). Each country's total duty today is shown beside its imports.

Country of origin	US imports, 2025	Share	vs 2024	Total duty today
China	$11M	89%	18%	16.2%12.5% with Pharmaceutical products and related appendix
Canada	$966K	8%	51%	13.7%0% with USMCA
Switzerland	$100K	1%	28%	12.5%
United Kingdom	$93K	1%	86%	13.7%10% with Pharmaceutical products and related appendix
Poland	$48K	0%	2%	10%10% with Pharmaceutical products and related appendix
India	$42K	0%	16%	13.7%10% with Pharmaceutical products and related appendix
Germany	$30K	0%	82%	10%10% with Pharmaceutical products and related appendix
Ukraine	$23K	0%	4%	3.7%0% with Pharmaceutical products and related appendix
Japan	$14K	0%	New	12.5%
Israel	$4K	0%	0%	16.2%12.5% with US-Israel FTA

Source: U.S. Census Bureau, general imports (8-digit group, as Census has no figures for this exact line). Duty on a $10,000 ocean shipment entered today, before customs fees. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Tariffs by country · Nov 9, 2026

US Import Duty on HTS 2931.59.00.25 by Country of Origin

As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from China pay 16.2% in duties: the 3.7% base rate plus Section 301 – Forced Labor (12.5%). Of the 20 largest sources of US imports, the lowest total is 10%, from Germany, Taiwan and 3 more.

Total duty from China

16.2%

Base rate plus 1 additional tariff

Lowest total duty

10%

From Germany, Taiwan and 3 more

Countries with additional tariffs

20 of 20

Section 232, 301 and other Chapter 99 duties

Country of origin	Base rate	Additional tariffs	Total duty
China	3.7%	Section 301 – Forced Labor12.5%9903.05.31	16.2%12.5% with Pharmaceutical products and related appendix
Mexico	3.7%	Section 301 – Forced Labor10%9903.05.55	13.7%0% with USMCA
Canada	3.7%	Section 301 – Forced Labor10%9903.05.29	13.7%0% with USMCA
Vietnam	3.7%	Section 301 – Forced Labor12.5%9903.05.84	16.2%12.5% with Pharmaceutical products and related appendix
Germany	3.7%	Section 301 – Forced Labor6.3%9903.05.39	10%10% with Pharmaceutical products and related appendix
Japan	3.7%	Section 301 – Forced Labor8.8%9903.05.49	12.5%
South Korea	3.7%	Section 301 – Forced Labor8.8%9903.05.71	12.5%
Taiwan	3.7%	Section 301 – Forced Labor6.3%9903.05.76	10%10% with Pharmaceutical products and related appendix
India	3.7%	Section 301 – Forced Labor10%9903.05.44	13.7%10% with Pharmaceutical products and related appendix
Ireland	3.7%	Section 301 – Forced Labor6.3%9903.05.39	10%10% with Pharmaceutical products and related appendix
Italy	3.7%	Section 301 – Forced Labor6.3%9903.05.39	10%10% with Pharmaceutical products and related appendix
Switzerland	3.7%	Section 301 – Forced Labor8.8%9903.05.74	12.5%
Thailand	3.7%	Section 301 – Forced Labor12.5%9903.05.77	16.2%12.5% with Pharmaceutical products and related appendix
Malaysia	3.7%	Section 301 – Forced Labor10%9903.05.54	13.7%10% with Pharmaceutical products and related appendix
United Kingdom	3.7%	Section 301 – Forced Labor10%9903.05.81	13.7%10% with Pharmaceutical products and related appendix
France	3.7%	Section 301 – Forced Labor6.3%9903.05.39	10%10% with Pharmaceutical products and related appendix
Indonesia	3.7%	Section 301 – Forced Labor10%9903.05.45	13.7%10% with Pharmaceutical products and related appendix
Brazil	3.7%	Section 301 – Brazil25%9903.05.01 Section 301 – Forced Labor12.5%9903.05.27	41.2%37.5% with Pharmaceutical products and related appendix
Bangladesh	3.7%	Section 301 – Forced Labor10%9903.05.26	13.7%10% with Pharmaceutical products and related appendix
Cambodia	3.7%	Section 301 – Forced Labor10%9903.05.28	13.7%10% with Pharmaceutical products and related appendix

Duty from each country, in words

As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from China pay 16.2% in duties: the 3.7% base rate plus Section 301 – Forced Labor (12.5%). With Pharmaceutical products and related appendix, qualifying goods pay 12.5%.
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Mexico pay 13.7% in duties: the 3.7% base rate plus Section 301 – Forced Labor (10%). With USMCA, qualifying goods pay 0%.
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Canada pay 13.7% in duties: the 3.7% base rate plus Section 301 – Forced Labor (10%). With USMCA, qualifying goods pay 0%.
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Vietnam pay 16.2% in duties: the 3.7% base rate plus Section 301 – Forced Labor (12.5%). With Pharmaceutical products and related appendix, qualifying goods pay 12.5%.
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Germany pay 10% in duties: the 3.7% base rate plus Section 301 – Forced Labor (6.3%). With Pharmaceutical products and related appendix, qualifying goods pay 10%.
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Japan pay 12.5% in duties: the 3.7% base rate plus Section 301 – Forced Labor (8.8%).
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from South Korea pay 12.5% in duties: the 3.7% base rate plus Section 301 – Forced Labor (8.8%).
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Taiwan pay 10% in duties: the 3.7% base rate plus Section 301 – Forced Labor (6.3%). With Pharmaceutical products and related appendix, qualifying goods pay 10%.
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from India pay 13.7% in duties: the 3.7% base rate plus Section 301 – Forced Labor (10%). With Pharmaceutical products and related appendix, qualifying goods pay 10%.
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Ireland pay 10% in duties: the 3.7% base rate plus Section 301 – Forced Labor (6.3%). With Pharmaceutical products and related appendix, qualifying goods pay 10%.
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Italy pay 10% in duties: the 3.7% base rate plus Section 301 – Forced Labor (6.3%). With Pharmaceutical products and related appendix, qualifying goods pay 10%.
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Switzerland pay 12.5% in duties: the 3.7% base rate plus Section 301 – Forced Labor (8.8%).
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Thailand pay 16.2% in duties: the 3.7% base rate plus Section 301 – Forced Labor (12.5%). With Pharmaceutical products and related appendix, qualifying goods pay 12.5%.
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Malaysia pay 13.7% in duties: the 3.7% base rate plus Section 301 – Forced Labor (10%). With Pharmaceutical products and related appendix, qualifying goods pay 10%.
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from United Kingdom pay 13.7% in duties: the 3.7% base rate plus Section 301 – Forced Labor (10%). With Pharmaceutical products and related appendix, qualifying goods pay 10%.
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from France pay 10% in duties: the 3.7% base rate plus Section 301 – Forced Labor (6.3%). With Pharmaceutical products and related appendix, qualifying goods pay 10%.
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Indonesia pay 13.7% in duties: the 3.7% base rate plus Section 301 – Forced Labor (10%). With Pharmaceutical products and related appendix, qualifying goods pay 10%.
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Brazil pay 41.2% in duties: the 3.7% base rate plus Section 301 – Brazil (25%) and Section 301 – Forced Labor (12.5%). With Pharmaceutical products and related appendix, qualifying goods pay 37.5%.
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Bangladesh pay 13.7% in duties: the 3.7% base rate plus Section 301 – Forced Labor (10%). With Pharmaceutical products and related appendix, qualifying goods pay 10%.
As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Cambodia pay 13.7% in duties: the 3.7% base rate plus Section 301 – Forced Labor (10%). With Pharmaceutical products and related appendix, qualifying goods pay 10%.

Duties on goods entered Nov 9, 2026 at the general rate (Column 2 where it applies), with tariff data verified through 2026 HTS Revision 20. Totals are before customs fees (MPF, HMF) and any antidumping or countervailing duties (AD/CVD); with a free account, the calculator checks the AD/CVD cases that may cover your import. Some tariffs and exemptions depend on details such as metal content or end use, which the calculator asks about. See US tariffs for every country.

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Legal notes

Relevant HTS Notes

Official USITC notes that may affect classification under HTS 2931.59.00.25.

Section 6 NotesProducts of the Chemical or Allied Industries Chapter 29 NotesOrganic chemicals

CBP rulings

Search CROSS Rulings for HTS 2931.59.00.25

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Questions

HTS 2931.59.00.25 FAQ

Something else? Ask us.

What does HTS code 2931.59.00.25 cover?

HTS code 2931.59.00.25 covers O-Pinacolyl methylphosphonochloridate, classified under Chapter 29 (Organic chemicals) in the US Harmonized Tariff Schedule. The general duty rate is 3.7%.

What is the duty rate for HTS 2931.59.00.25?

The general (Column 1) rate of duty for HTS 2931.59.00.25 is 3.7%. Goods that qualify for a trade program can enter at the special rate: Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG). The Column 2 rate, for countries without normal trade relations, is 25%. Additional Chapter 99 tariffs, such as Section 301 and Section 232, can apply on top depending on the country of origin.

What is the US tariff on O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from China?

As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from China pay 16.2% in duties: the 3.7% base rate plus Section 301 – Forced Labor (12.5%).

What is the US tariff on O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Vietnam?

As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Vietnam pay 16.2% in duties: the 3.7% base rate plus Section 301 – Forced Labor (12.5%). Goods that qualify for Pharmaceutical products and related appendix pay 12.5%.

What is the US tariff on O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Mexico?

As of Nov 9, 2026, US imports of O-Pinacolyl methylphosphonochloridate (HTS 2931.59.00.25) from Mexico pay 13.7% in duties: the 3.7% base rate plus Section 301 – Forced Labor (10%). Goods that qualify for USMCA pay 0%.

Which country has the lowest US duty on HTS 2931.59.00.25?

Of the 20 largest sources of US imports, the lowest total duty on HTS 2931.59.00.25 is 10%, from Germany, Taiwan and 3 more, as of the tariffs in effect on 2026-11-09.

Sources

Primary Sources

The official documents behind the rates and tariffs on this page. Duties are worked out from them as of Revision 20 (2026); check the legal text before you file.