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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.

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See the official tariff text

Official tariff text

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

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.

Full 8-digit codes

Pick the description that best matches your product.

7 codes below this one

Compare the sibling codes

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

Export to Norway

What Norwegian customs charges when goods like these are imported into Norway.

  • 29.31.4901

    Butyl methylphosphinate

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

  • 29.31.4902

    Bis(1-methylpentyl) methylphosphonate

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

  • 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
    Goods of EU origin
    Duty free You need documentation of EU origin to use this rate.

  • 29.31.4909

    Other

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

Norwegian tariff data version 1.5/1.2, last checked Aug. 3, 2026.

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

Export to the United Kingdom

What UK customs charges when goods like these are imported into the UK.

  • 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 v4.0.1576, last checked Aug. 3, 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).

Check the neighbouring codes

The codes just before and after this one, in case a nearby group fits better.

See all 17 codes at this level
Previous code 2931 48

3,9-Dimethyl-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5] undecane 3,9-d…
you are here 2931 49

Separate chemically defined non-halogenated organo-phosphorous deriva…

Next code 2931 51

Methylphosphonic dichloride

Duty rates shown here are estimates, read from official EU / Danish, Norwegian and UK tariff data for orientation only. Confirm the current rate with SKAT, 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.