2931.49: Other organo-inorganic compounds, non-halogenated organo-phosphorous derivatives, other

1. 2931 49 00 00 Other
2. 2931 49 10 00 Sodium 3-(trihydroxysilyl)propyl methylphosphonate 6%
3. 2931 49 20 00 Bis[(5-ethyl-2-methyl-2-oxido-1.3,2-dioxaphosphinan-5-yl)methyl] methylphosphonate 6%
4. 2931 49 30 00 Etidronic acid (inn) (1-hydroxyethane-1.1-diphosphonic acid) and its salts Free
5. 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 6%
6. 2931 49 50 00 Bis(1-methylpentyl) methylphosphonate 6%
7. 2931 49 60 00 Butyl methylphosphinate 6%
8. 2931 49 80 00 Other
9. 2931 49 80 08 Sodium diisobutyldithiophosphinate (cas rn 13360-78-6) in an aqueous solution 6%
10. 2931 49 80 10 Triethyl phosphonoacetate (cas rn 867-13-0) with a purity by weight of 98% or more 6%
11. 2931 49 80 13 Trioctylphosphine oxide (cas rn 78-50-2) 6%
12. 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 6%
13. 2931 49 80 25 (z)-prop-1-en-1-ylphosphonic acid (cas rn 25383-06-6) 6%
14. 2931 49 80 35 Ethyl phenyl(2.4,6-trimethylbenzoyl)phosphinate (cas rn 84434-11-7) 6%
15. 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 6%
16. 2931 49 80 40 Tetrakis(hydroxymethyl)phosphonium chloride (cas rn 124-64-1) 6%
17. 2931 49 80 55 3-(hydroxyphenylphosphinoyl)propionic acid (cas rn 14657-64-8) 6%
18. 2931 49 80 60 2-phosphonobutane-1.2,4-tricarboxylic acid (cas rn 37971-36-1) and its sodium salt tetrasodium hydrogen 2-phosphonatobutane-1.2,4-tricarboxylate (cas rn 66669-53-2), in solid form or in an aqueous solution 6%
19. 2931 49 80 90 Other Free

Additional duties and import rules

Charges on top of the customs duty, and rules the goods must meet at the border.

Preferential rates by country

UK: imports by month

last 12 months£18.9m+10.4% · previous 12 months

Average import price£1.90 per kg

Main suppliers, last 12 months

Country	Value	Share	Change
China	£13.7m	72.7%	+14.3%
Germany	£2.7m	14.4%	+5.3%
Italy	£789k	4.2%	-30.3%
Switzerland	£319k	1.7%	+1,111%
United Kingdom	£227k	1.2%	+59.1%
United States	£206k	1.1%	-53.8%
India	£201k	1.1%	-1.8%
Sri Lanka	£173k	0.9%	—

Same subheading in other tariffs

EU 6.5% Third-country duty 7 tariff lines Türkiye 6.5% Third-country duty 15 tariff lines USA 3.7% General (MFN) 1 tariff line Canada Free General (MFN) 5 tariff lines Mexico Free – 5% General (MFN) 11 tariff lines · average 0.5% Brazil Free – 12.6% General (MFN) 12 tariff lines · average 7.7% Argentina Free – 12.6% General (MFN) 26 tariff lines · average 9.4% Peru Free General (MFN) 6 tariff lines New Zealand Free General (MFN) 8 tariff lines Japan 3.1% General (MFN) 1 tariff line Taiwan 5% General (MFN) 4 tariff lines GCC 5% General (MFN) 11 tariff lines Switzerland Free General (MFN) 1 tariff line Norway Free General (MFN) 4 tariff lines North Macedonia Free General (MFN) 7 tariff lines Nigeria 5% General (MFN) 1 tariff line

World trade in 2024

Top exporters

Rank	Country	Value	Share
1	China	US$2bn	57.2%
2	United States	US$607m	18.2%
3	Germany	US$150m	4.5%
4	Belgium	US$118m	3.5%
5	Netherlands	US$100m	3%
6	India	US$77m	2.3%
7	Canada	US$65m	2%
8	United Kingdom	US$58m	1.7%
9	Ireland	US$52m	1.6%
10	Switzerland	US$42m	1.3%

Top importers

Rank	Country	Value	Share
1	United States	US$657m	19.7%
2	Argentina	US$456m	13.7%
3	Brazil	US$435m	13.1%
4	Belgium	US$236m	7.1%
5	Indonesia	US$136m	4.1%
6	Russia	US$111m	3.3%
7	Spain	US$108m	3.3%
8	Malaysia	US$93m	2.8%
9	Japan	US$87m	2.6%
10	Italy	US$79m	2.4%

Import duty on this product around the world 93

The most-favoured-nation (MFN) duty each country applies to goods of this HS subheading: the average over its national tariff lines, with the lowest and highest line where they differ. Goods from countries with a trade agreement often pay less.

• 2.5%median duty
• 36number of duty-free countries (MFN)
• 45%highest: Bahamas, Fiji, Bermuda

93

Importing country	MFN duty	lines from – to	data year
Albania	0%		2023
Algeria	15%		2023
Armenia	1.5%	0% – 3%	2023
Australia	2.5%	0% – 5%	2023
Bahamas	45%		2022
Bahrain	5%		2023
Belize	5%		2023
Benin	5%		2023
Bermuda	25%		2023
Bhutan	10%		2022
Bosnia & Herzegovina	0%		2022
Botswana	0%		2023
Burkina Faso	5%		2023
Burundi	0%		2023
Cameroon	10%		2023
Canada	0%		2023
Central African Republic	10%		2023
Chad	10%		2023
China	6.5%		2023
Congo - Brazzaville	10%		2023
Costa Rica	0%		2023
Dominican Republic	0%		2023
El Salvador	0%		2022
Equatorial Guinea	10%		2023
Eswatini	0%		2023
European Union (27 countries)	6.5%		2023
Fiji	32%		2023
French Polynesia	8%		2023
Gabon	10%		2023
Gambia	5%		2023
Ghana	5%		2023
Guatemala	0%		2023
Guinea	5%		2023
Guinea-Bissau	5%		2023
Honduras	0%		2023
Hong Kong SAR China	0%		2023
Iceland	0%		2023
India	7.5%		2023
Indonesia	1.7%	0% – 5%	2023
Jamaica	0%		2023
Japan	1.6%		2023
Jordan	0%		2023
Kazakhstan	1.5%	0% – 3%	2023
Kenya	0%		2023
Kuwait	5%		2023
Lesotho	0%		2023
Liberia	5%		2023
Macao SAR China	0%		2023
Madagascar	10%		2023
Malaysia	1.7%	0% – 5%	2023
Maldives	15%		2023
Mali	5%		2023
Mauritius	0%		2023
Mongolia	5%		2023
Morocco	2.5%		2023
Mozambique	2.5%		2023
Namibia	0%		2023
Nepal	10%		2023
New Zealand	0%		2023
Nicaragua	0%		2023
Niger	5%		2023
Nigeria	5%		2023
North Macedonia	0%		2023
Norway	0%		2023
Oman	5%		2023
Pakistan	0%		2023
Panama	0%		2023
Papua New Guinea	0%		2023
Philippines	1%		2023
Qatar	5%		2023
Rwanda	0%		2023
Saudi Arabia	5%		2023
Senegal	5%		2023
Seychelles	0%		2023
Sierra Leone	5%		2023
South Africa	0%		2023
South Korea	6.5%		2023
Sri Lanka	0%		2023
St Kitts & Nevis	0%		2023
St Vincent & the Grenadines	5%		2023
Switzerland	0.3%*		2023
Tanzania	0%		2023
Thailand	0%		2023
Togo	5%		2023
Türkiye	6.5%		2023
Uganda	0%		2023
United Arab Emirates	5%		2023
United Kingdom	5.3%	0% – 6%	2023
United States	3.7%		2023
Vanuatu	5%		2023
Vietnam	0%		2023
Zambia	7.5%	0% – 15%	2023
Zimbabwe	0.1%		2023

Tariff data years 2022–2023; rates may have changed since. * ad valorem equivalent of specific duties (UNCTAD estimate) · UNCTAD TRAINS, accessed via WITS (World Bank)

Classifications and correspondences

Where this HS subheading sits in the United Nations' statistical classifications, and which codes it had in earlier editions of the Harmonized System.

SITC Rev. 4

5155 Other organo-inorganic compounds

End use (BEC Rev. 5)

Intermediate goods · BEC 211220

CPC 2.1 product

34160 Organo-sulphur compounds and other organo-inorganic compounds; heterocyclic compounds n.e.c.; nucleic acids and their salts

ISIC Rev. 4 activity

2011 Manufacture of basic chemicals

Earlier HS editions

Correspondence tables of the United Nations Statistics Division (UNSD)

Binding rulings for similar goods 1

Recent rule changes mentioning this code

Acts whose text cites this code or its heading. Check the act itself: a code can be cited for reasons other than a change of its duty.

1. Tariff change 23 September 2026

   Guidance and Procedures for Implementing Tariff Adjustments for Specialty Pharmaceuticals and Associated Pharmaceutical Ingredients and Technical Corrections to the Harmonized Tariff Schedule of the United States for Duties Imposed Under Proclamation 11020

   FR Doc. 2026-19498 · 91 FR 60360 · Source: federalregister.gov

2. Anti-dumping 21 September 2026 · Applies from: 6 June 2026

   Commission Implementing Regulation (EU) 2026/2088 of 18 September 2026 imposing a definitive anti-dumping duty and definitively collecting the provisional duty imposed on imports of certain alkyl phosphonic acids and their sodium salts originating in the People’s Republic of China

   CELEX 32026R2088 · Source: eur-lex.europa.eu

3. Tariff change 5 August 2026

   UK Trade Tariff: measure changes on 64 commodity codes

   Trade Tariff changes 2026-08-05 · Source: trade-tariff.service.gov.uk

4. Import and export controls 20 July 2026

   Notice of Action: Brazil's Acts, Policies, and Practices Related to Digital Trade and Electronic Payment Services; Unfair, Preferential Tariffs; Anti-Corruption Enforcement; Intellectual Property Protection; Ethanol Market Access; and Illegal Deforestation

   FR Doc. 2026-14542 · 91 FR 45516 · Source: federalregister.gov

5. Anti-dumping 6 July 2026

   Glyphosate From China; Institution of Antidumping and Countervailing Duty Investigations and Scheduling of Preliminary Phase Investigations

   FR Doc. 2026-13517 · 91 FR 41085 · Source: federalregister.gov

6. Tariff change 4 June 2026

   Notice of Determination and Request for Comments Concerning Action Pursuant to Section 301: Brazil's Acts, Policies, and Practices Related to Digital Trade and Electronic Payment Services; Unfair, Preferential Tariffs; Anti-Corruption Enforcement; Intellectual Property Protection; Ethanol Market Access; and Illegal Deforestation

   FR Doc. 2026-11158 · 91 FR 33854 · Source: federalregister.gov

7. Anti-dumping 13 May 2026 · Applies from: 14 May 2026

   Commission Implementing Regulation (EU) 2026/1045 of 12 May 2026 imposing a provisional anti-dumping duty on imports of certain alkyl phosphonic acids and their sodium salts originating in the People’s Republic of China

   CELEX 32026R1045 · Source: eur-lex.europa.eu

8. Sanctions 23 April 2026 · Applies from: 10 May 2026

   Council Regulation (EU) 2026/513 of 23 April 2026 amending Regulation (EC) No 765/2006 concerning restrictive measures in view of the situation in Belarus and the involvement of Belarus in the Russian aggression against Ukraine

   CELEX 32026R0513 · Source: eur-lex.europa.eu

Rule changes →

Code history

Since 2022; before, these goods were classified under 2931.34, 2931.37, 2931.39.

Questions and answers