2931.90: Other organo-inorganic compounds, other

1. 2931 90 00 00 Other
2. 2931 90 00 15 Methylcyclopentadienyl manganese tricarbonyl (cas rn 12108-13-3) containing not more than 4.9% by weight of cyclopentadienyl manganese tricarbonyl 6%
3. 2931 90 00 21 (2-fluoro-4-phenoxyphenyl)boronic acid (cas rn 1414356-30-1) with a purity by weight of 95% or more 6%
4. 2931 90 00 23 Ixazomib citrate (innm) (cas rn 1239908-20-3) with a purity by weight of 95% or more 6%
5. 2931 90 00 28 Triethoxy(3-isocyanatopropyl)silane (cas rn 24801-88-5) with a purity by weight of 96% or more 6%
6. 2931 90 00 30 Tert-butylchlorodimethylsilane (cas rn 18162-48-6) with a purity by weight of 99% or more 6%
7. 2931 90 00 38 2-(trimethylsilyl)ethoxymethyl chloride (cas rn 76513-69-4) with a purity by weight of 98% or more 6%
8. 2931 90 00 40 Chlorotrimethylsilane (cas rn 75-77-4) with a purity by weight of 98% or more 6%
9. 2931 90 00 43 Trimethylindium (cas rn 3385-78-2) with a purity by weight of 99% or more 6%
10. 2931 90 00 48 4-phenoxybenzeneboronic acid (cas rn 51067-38-0) with a purity by weight of 98% or more 6%
11. 2931 90 00 50 Trimethylsilane (cas rn 993-07-7) 6%
12. 2931 90 00 55 3-(hydroxymethyl)phenylboronic acid (cas rn 87199-15-3) with a purity by weight of 95% or more 6%
13. 2931 90 00 58 Trimethylgallium (cas rn 1445-79-0) with a purity by weight of 99% or more 6%
14. 2931 90 00 68 Hydrogen tetrakis(pentafluorophenyl)borate(1-)-n,n-dimethylaniline (1:1) (cas rn 118612-00-3) with a purity by weight of 99% or more 6%
15. 2931 90 00 75 Hexadecyltrimethoxysilane (cas rn 16415-12-6) with a purity by weight of at least 95%, for use in the manufacture of polyethylene 6%
16. 2931 90 00 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£51.7m+5.4% · previous 12 months

Average import price£6.05 per kg

Main suppliers, last 12 months

Country	Value	Share	Change
China	£20.2m	39.2%	+21.5%
United States	£8.4m	16.2%	-5.6%
Germany	£7.9m	15.2%	-5.1%
Poland	£4.6m	8.9%	-7.1%
India	£1.5m	3%	-5.7%
Canada	£1.2m	2.4%	+3,013.9%
United Kingdom	£1.2m	2.3%	+21.2%
Singapore	£1.1m	2.1%	-6.4%

Same subheading in other tariffs

EU 6.5% Third-country duty 1 tariff line Türkiye 6.5% Third-country duty 10 tariff lines USA Free – 6.5% General (MFN) 9 tariff lines · average 4.7%

World trade in 2024

Top exporters

Rank	Country	Value	Share
1	China	US$1bn	31.4%
2	United States	US$645m	14.7%
3	Germany	US$644m	14.6%
4	South Korea	US$382m	8.7%
5	Japan	US$270m	6.2%
6	Netherlands	US$148m	3.4%
7	United Kingdom	US$139m	3.2%
8	India	US$130m	3%
9	Taiwan	US$121m	2.8%
10	France	US$86m	2%

Top importers

Rank	Country	Value	Share
1	United States	US$542m	12.3%
2	China	US$487m	11.1%
3	South Korea	US$326m	7.4%
4	Netherlands	US$311m	7.1%
5	Japan	US$271m	6.2%
6	Germany	US$218m	5%
7	India	US$212m	4.8%
8	Taiwan	US$206m	4.7%
9	Belgium	US$153m	3.5%
10	Italy	US$152m	3.5%

Binding rulings for similar goods 6

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. 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

3. 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

4. Suspension 30 June 2026 · Applies from: 16 July 2026

   Council Regulation (EU) 2026/1463 of 25 June 2026 amending Regulation (EU) 2021/2278 suspending the Common Customs Tariff duties referred to in Article 56(2), point (c), of Regulation (EU) No 952/2013 of the European Parliament and of the Council on certain agricultural and industrial products

   CELEX 32026R1463 · Source: eur-lex.europa.eu

5. Quota 30 June 2026 · Applies from: 12 July 2026

   Council Regulation (EU) 2026/1465 of 25 June 2026 amending Regulation (EU) 2021/2283 opening and providing for the management of autonomous tariff quotas of the Union for certain agricultural and industrial products

   CELEX 32026R1465 · Source: eur-lex.europa.eu

6. Other 30 June 2026

   Update to Commodity Code structure to maintain dynamic alignment with the EU – 30 June 2026

   Trade Tariff news 6995 · Source: trade-tariff.service.gov.uk

7. 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

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 →

Products classified here

• cyclopentadienyltitanium trichloride

Questions and answers

Typical products

• cyclopentadienyltitanium trichloride

Everyday names, not part of the legal text.