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Code 2931 59 · Heading 2931

Other derivatives of halogenated organic phosphorus compounds

This code covers derivatives of halogenated organic phosphorus compounds that are not otherwise specifically named in the tariff tree. It does not cover the separately listed halogenated compounds or the separately listed derivatives of non-halogenated organic phosphorus compounds.

See the official tariff text

Official tariff text

Separate chemically defined halogenated organo-phosphorous derivatives, n.e.s.

How we got to this code

  1. VI
  2. 29
  3. 2931
  4. 2931 59
Show the steps

Pick the 8-digit code

Pick the description that best matches your product.

Import duty on the codes below: 6.5%

2 codes below this one

This is the catch-all under 2931: it covers what the sibling codes below do not.

This is the remainder for derivatives of halogenated organic phosphorus compounds in the parent group after excluding the specifically named compounds and compound classes in the sibling codes.

Compare the sibling codes

See all 17 codes at this level

Classification decides the rate here: from 0.0% to 6.5%.

Selling to Norway, Great Britain and the United States

What they charge on arrival.

Norway, Great Britain and the United States use their own tariff lines under the 6-digit HS code. The rates below are what their customs charge on goods arriving from the EU. Match the goods against each country's own wording before you rely on a rate.

Norway

Duty free

  • Their lines4 Norwegian lines

29.31.5901 P-Alkyl (≤C10, incl. cycloalkyl) N-(1-(dialkyl (≤C10, incl. cycloalkyl) amino))alkylidene

Norwegian tariff data checked Sept. 13, 2026.

Great Britain

The rate depends on the line.

  • Their lines3 British lines
  • EU originDuty free

2931 59 10 00 Methylphosphonoyl difluoride (methylphosphonic difluoride)

Northern Ireland follows other rules.

UK tariff data checked Sept. 13, 2026.

United States

10.0%

Estimated from published US measures

  • Their lines8 US lines
  • Entry dateSept. 17, 2026

2931.59.00.10 Other organo-inorganic compounds, Halogenated organo-phosphorous derivatives

The US importer of record files the entry.

US tariff data checked Sept. 16, 2026.

See the 4 Norwegian lines

Selling to Norway

Norway splits the 6-digit category its own way, so these are Norway's own lines under it, not this EU code. Check your product against their wording; what Norwegian customs charges is shown per line.

  • 29.31.5901

    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

    Ordinary duty
    Duty free

  • 29.31.5902

    Methyl-(bis(diethylamino)methylene)phosphonamidofluoridate

    Ordinary duty
    Duty free

  • 29.31.5903

    Containing a phosphorus atom to which one methyl, ethyl, n-propyl or isopropyl group is bonded but no further carbon atoms

    Ordinary duty
    Duty free

  • 29.31.5909

    Other

    Ordinary duty
    Duty free

Norwegian tariff data version 1.5/1.2, last checked Sept. 13, 2026.

Contains data from Norwegian Customs (data.toll.no), licensed under CC BY 4.0, adapted for display.

See the 3 British lines

Selling to Great Britain

What UK customs charges when goods like these arrive in Great Britain.

  • 2931 59 10 00

    Methylphosphonoyl difluoride (methylphosphonic difluoride)

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2931 59 90 50

    2-Chloroethylphosphonic acid (CAS RN 16672-87-0) solid or in aqueous solution, with a content by weight of 2-Chloroethylphosphonic acid of 65 % or more

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 2931 59 90 90

    Other

    Ordinary duty
    Depends on the product details
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

These rates apply in Great Britain. Different rules may apply for goods entering Northern Ireland.

UK tariff data version v4.0.1599, last checked Sept. 13, 2026.

Contains public sector information licensed under the Open Government Licence v3.0.

Source: UK Department for Business and Trade (data.api.trade.gov.uk).

See the 8 US lines

Selling to the United States

What US customs charges when goods like these arrive from the EU. The US importer of record files the entry and pays the duty.

  • 2931.59.00.10

    Other organo-inorganic compounds, Halogenated organo-phosphorous derivatives, Other, O-Alkyl (≤ C10, including cycloalkyl) alkyl (methyl, ethyl,n- propyl or isopropyl) phosphonofluoridates

    General rate
    3.7%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 2931.59.00.15

    Other organo-inorganic compounds, Halogenated organo-phosphorous derivatives, Other, Alkyl (methyl, ethyl, n-propyl or isopropyl) phosphonyl difluorides

    General rate
    3.7%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 2931.59.00.20

    Other organo-inorganic compounds, Halogenated organo-phosphorous derivatives, Other, O-Isopropyl methylphosphonochloridate

    General rate
    3.7%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 2931.59.00.25

    Other organo-inorganic compounds, Halogenated organo-phosphorous derivatives, Other, O-Pinacolyl methylphosphonochloridate

    General rate
    3.7%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 2931.59.00.30

    Other organo-inorganic compounds, Halogenated organo-phosphorous derivatives, Other, 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

    General rate
    3.7%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 2931.59.00.35

    Other organo-inorganic compounds, Halogenated organo-phosphorous derivatives, Other, Methyl- bis(diethylamino)methylene)phosphonamidofluoridate

    General rate
    3.7%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 2931.59.00.60

    Other organo-inorganic compounds, Halogenated organo-phosphorous derivatives, Other, Containing a phosphorus atom to which one methyl, ethyl, n-propyl or isopropyl group is bonded but no further carbon atoms

    General rate
    3.7%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 2931.59.00.80

    Other organo-inorganic compounds, Halogenated organo-phosphorous derivatives, Other

    General rate
    3.7%
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

Worked out for an entry on Sept. 17, 2026.

US tariff schedule 2026HTSRev19, last checked Sept. 16, 2026.

Last change we recorded: Revision 19 (2026), Sept. 16, 2026.

Anti-dumping and countervailing duties, US import taxes and customs fees are not included.

The descriptions above are the US tariff texts, which the United States publishes in English only.

Source: the US International Trade Commission's Harmonized Tariff Schedule (hts.usitc.gov), public domain, and the measures published in the Federal Register.

This is a planning estimate from the US Harmonized Tariff Schedule (revision shown) and the published Federal Register measures as of the date shown, for a shipment of EU origin. It is not a customs entry, legal advice or a broker's opinion, and tariffs.help is not a US-licensed customs broker. The US importer of record or their broker confirms the classification, origin, value and the duty due before filing.

Duty rates shown here are estimates, read from official EU / Danish, Norwegian and UK tariff data for orientation only. Confirm the current rate with Toldstyrelsen, TARIC, Norwegian Customs or the UK Online Trade Tariff before you file. The rate you pay can also depend on the country of origin. These are base customs duties only: import VAT, excise duties, anti-dumping duties and safeguard or quota measures are not included.