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Code 2931 49 · Heading 2931

Other derivatives of non-halogenated organic phosphorus compounds

This code covers derivatives of non-halogenated organic phosphorus compounds that are not specifically named elsewhere in this group. It does not cover the separately listed halogenated derivatives or the other specifically named phosphorus compounds.

See the official tariff text

Official tariff text

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

How we got to this code

  1. VI
  2. 29
  3. 2931
  4. 2931 49
Show the steps

Pick the 8-digit code

Pick the description that best matches your product.

Import duty on the codes below: 0.0–6.5%

7 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 non-halogenated organic phosphorus derivatives in the parent group that are not the specifically named lead, tin, phosphorus, phosphonic-acid, or other compounds covered by 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

29.31.4901 Butyl methylphosphinate

Norwegian tariff data checked Sept. 13, 2026.

Great Britain

The rate depends on the line.

  • Their lines17 British lines
  • EU originDuty free

2931 49 10 00 Sodium 3-(trihydroxysilyl)propyl methylphosphonate

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

2931.49.00.05 Other organo-inorganic compounds, Non-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.

  • 29.31.4901

    Butyl methylphosphinate

    Ordinary duty
    Duty free

  • 29.31.4902

    Bis(1-methylpentyl) methylphosphonate

    Ordinary duty
    Duty free

  • 29.31.4903

    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

  • 29.31.4909

    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 17 British lines

Selling to Great Britain

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

  • 2931 49 10 00

    Sodium 3-(trihydroxysilyl)propyl methylphosphonate

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

  • 2931 49 20 00

    Bis[(5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl)methyl] methylphosphonate

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

  • 2931 49 30 00

    Etidronic acid (INN) (1-hydroxyethane-1,1-diphosphonic acid) and its salts

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

  • 2931 49 40 00

    (Nitrilotrimethanediyl)tris(phosphonic acid), {ethane-1,2-diylbis[nitrilobis(methylene)]}tetrakis(phosphonic acid), [(bis{2-[bis(phosphonomethyl)amino]ethyl}amino)methyl]phosphonic acid, {hexane-1,6-diylbis[nitrilobis(methylene)]}tetrakis(phosphonic acid), {[(2-hydroxyethyl)imino]bis(methylene)}bis(phosphonic acid), and [(bis{6-[bis(phosphonomethyl)amino]hexyl}amino)methyl]phosphonic acid; salts thereof

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

  • 2931 49 50 00

    Bis(1-methylpentyl) methylphosphonate

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

  • 2931 49 60 00

    Butyl methylphosphinate

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

  • 2931 49 80 08

    Sodium diisobutyldithiophosphinate (CAS RN 13360-78-6) in an aqueous solution

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

  • 2931 49 80 10

    Triethyl phosphonoacetate (CAS RN 867-13-0) with a purity by weight of 98 % or more

    Ordinary duty
    6.0%
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.
Show all 17 lines

  • 2931 49 80 13

    Trioctylphosphine oxide (CAS RN 78-50-2)

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

  • 2931 49 80 20

    Tetrabutylphosphonium acetate (CAS RN 30345-49-4) in the form of an aqueous solution, containing by weight 40 % or more but not more than 50 % of tetrabutylphosphonium acetate

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

  • 2931 49 80 25

    (Z)-Prop-1-en-1-ylphosphonic acid (CAS RN 25383-06-6)

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

  • 2931 49 80 35

    Ethyl phenyl(2,4,6-trimethylbenzoyl)phosphinate (CAS RN 84434-11-7)

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

  • 2931 49 80 38

    N-(Phosphonomethyl)iminodiacetic acid (CAS RN 5994-61-6) containing by weight not more than 15 % of water, and with a dry weight purity of 97 % or more

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

  • 2931 49 80 40

    Tetrakis(hydroxymethyl)phosphonium chloride (CAS RN 124-64-1)

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

  • 2931 49 80 55

    3-(Hydroxyphenylphosphinoyl)propionic acid (CAS RN 14657-64-8)

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

  • 2931 49 80 60

    alkyl phosphonic acids and their sodium salts

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

  • 2931 49 80 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.

  • 2931.49.00.05

    Other organo-inorganic compounds, Non-halogenated organo-phosphorous derivatives, Other, O-Alkyl (≤C10, including cycloalkyl) N,N-dialkyl (methyl, ethyl, n-propyl or isopropyl) phosphoramidocyanidates

    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

  • 2931.49.00.08

    Other organo-inorganic compounds, Non-halogenated organo-phosphorous derivatives, Other, [O-2-(Dialkyl (methyl, ethyl, n-propyl or isopropyl) amino)ethyl] hydrogen alkyl (methyl, ethyl, n-propyl or isopropyl) phosphonites and their O-alkyl (≤C10, including cycloalkyl) esters; alkylated or protonated salts thereof

    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

  • 2931.49.00.10

    Other organo-inorganic compounds, Non-halogenated organo-phosphorous derivatives, Other, 2-Amino-4-[hydroxy(methyl)phosphonoyl] butanoic acid (glufosinate) and its salts and esters

    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

  • 2931.49.00.15

    Other organo-inorganic compounds, Non-halogenated organo-phosphorous derivatives, Other, Butyl methylphosphinate

    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

  • 2931.49.00.20

    Other organo-inorganic compounds, Non-halogenated organo-phosphorous derivatives, Other, N-(Phosphonomethyl) glycine (glyphosate) and its salts and esters

    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

  • 2931.49.00.25

    Other organo-inorganic compounds, Non-halogenated organo-phosphorous derivatives, Other, Bis(1-methylpentyl) methylphosphonate

    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

  • 2931.49.00.55

    Other organo-inorganic compounds, Non-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

  • 2931.49.00.80

    Other organo-inorganic compounds, Non-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.