Chapter 29 · Organic chemicals · Section 6

HS Code 2931.90

Other

Heading 2931: Other organo-inorganic compounds

US duty (general)
Free - 6.5%
US HTS lines
9
EU CN codes
1
UK commodity codes
16
Unit
kg

US HTS + UK Tariff v4.0.1596 · updated 2026-09-10 · sources

United States - HTS lines under 2931.90

Source: official Harmonized Tariff Schedule (USITC). "General" is the normal-trade-relations rate; "Special" lists preference programs; "Other" is the column-2 rate. Additional Section 232/301 duties may apply on top.

HTS codeDescriptionGeneralSpecialOtherUnit
2931.90.05 Aromatic >
Diphenyldichlorosilane; and phenyltrichlorosilane 		Free - 15.4¢/kg + 68.5% kg
2931.90.10 Aromatic >
4,4'-Diphenylbisphosphonous acid, di(2',2",4',4"-di-tert-butyl)phenyl ester 		6.5% Free (A+, AU, BH, CL,CO,D, E, IL, JO, KR, MA, OM, P, PA, PE, S, SG) 15.4¢/kg + 40% kg
2931.90.15 Aromatic >
Sodium tetraphenylboron 		5.8% Free (A+, AU, BH, CL, CO, D, E, IL, JO, KR, MA, OM, P, PA, PE, S, SG) 15.4¢/kg + 40% kg
2931.90.22 Aromatic > Other >
Drugs 		6.5% Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG) 15.4¢/kg + 67.5% kg
2931.90.26 Aromatic > Other >
Pesticides 		6.5% Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) 15.4¢/kg + 40% kg
2931.90.30 Other > Other >
Products described in additional U.S. note 3 to section VI 		6.5% Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG) 15.4¢/kg + 68.5% kg
2931.90.60 Other > Other >
Other 		6.5% Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG) 15.4¢/kg + 68.5% kg
2931.90.70 Other >
N,N'-Bis(trimethylsilyl) urea; 3-(Hydroxymethylphosphinyl)-1-propanoic acid, 2-hydroxyethyl ester; and 2-Phosphonobutane-1,2,4-tricarboxylic acid and its salts 		Free - 25% kg
2931.90.90 Other >
Other
8 statistical lines (10-digit)
  • 2931.90.90.10 - Organo-silicon compounds
  • 2931.90.90.21 - Dibutyltin oxide
  • 2931.90.90.25 - Tetrabutyltin
  • 2931.90.90.29 - Other
  • 2931.90.90.30 - 2-Chlorovinyldichloroarsine
  • 2931.90.90.35 - Bis(2-chlorovinyl)chloroarsine
  • 2931.90.90.40 - Tris(2-chlorovinyl)arsine
  • 2931.90.90.52 - Other
 3.7% Free (A*,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG) 25% kg

Estimate the US duty runs in your browser · no caps

Enter the customs value (and quantity, when a rate is per-unit) to estimate the general-rate duty per HTS line. Estimates exclude Section 232/301 surcharges, MPF/HMF and fees. Not a customs ruling.

European Union - CN codes under 2931.90

Source: EU Combined Nomenclature (Eurostat, © European Union, reused per Decision 2011/833/EU). Duty rates and measures live in TARIC; each code links to the official consultation.

CN codeDescription
2931 90 00 Other EU duty (TARIC) →

United Kingdom - commodity codes under 2931.90

Source: UK Integrated Online Tariff (Open Government Licence v3.0). Declarable 10-digit codes go on the customs declaration; check the official page for the current duty and VAT measures.

Commodity codeDescription
2931 90 00 00 Other UK duty & VAT →
2931 90 00 15 Methylcyclopentadienyl manganese tricarbonyl (CAS RN 12108-13-3) containing not more than 4,9 % by weight of cyclopentadienyl manganese tricarbonyl UK duty & VAT →
2931 90 00 21 (2-Fluoro-4-phenoxyphenyl)boronic acid (CAS RN 1414356-30-1) with a purity by weight of 95 % or more UK duty & VAT →
2931 90 00 23 Ixazomib citrate (INNM) (CAS RN 1239908-20-3) with a purity by weight of 95 % or more UK duty & VAT →
2931 90 00 28 Triethoxy(3-isocyanatopropyl)silane (CAS RN 24801-88-5) with a purity by weight of 96 % or more UK duty & VAT →
2931 90 00 30 Tert-Butylchlorodimethylsilane (CAS RN 18162-48-6) with a purity by weight of 99 % or more UK duty & VAT →
2931 90 00 38 2-(Trimethylsilyl)ethoxymethyl chloride (CAS RN 76513-69-4) with a purity by weight of 98 % or more UK duty & VAT →
2931 90 00 40 Chlorotrimethylsilane (CAS RN 75-77-4) with a purity by weight of 98 % or more UK duty & VAT →
2931 90 00 43 Trimethylindium (CAS RN 3385-78-2) with a purity by weight of 99 % or more UK duty & VAT →
2931 90 00 48 4-Phenoxybenzeneboronic acid (CAS RN 51067-38-0) with a purity by weight of 98 % or more UK duty & VAT →
2931 90 00 50 Trimethylsilane (CAS RN 993-07-7) UK duty & VAT →
2931 90 00 55 3-(Hydroxymethyl)phenylboronic acid (CAS RN 87199-15-3) with a purity by weight of 95 % or more UK duty & VAT →
2931 90 00 58 Trimethylgallium (CAS RN 1445-79-0) with a purity by weight of 99 % or more UK duty & VAT →
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 UK duty & VAT →
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 UK duty & VAT →
2931 90 00 90 Other UK duty & VAT →
Not a customs ruling. Classification is determined by the importing country's customs authority and depends on the exact product. This page is reference information from official published schedules, not legal advice. For a binding decision, request a ruling (US: CBP CROSS · UK: HMRC ATaR · EU: BTI).

Other subheadings in 2931

2931.00 2931 Other organo-inorganic compounds 2931.10 Tetramethyl lead and tetraethyl lead 2931.20 Tributyltin compounds 2931.41 Dimethyl methylphosphonate 2931.42 Dimethyl propylphosphonate 2931.43 Diethyl ethylphosphonate 2931.44 Methylphosphonic acid 2931.45 Salt of methylphosphonic acid and (aminoiminomethyl)urea (1:1) 2931.46 2,4,6-Tripropyl-1,3,5,2,4,6-trioxatriphosphinane 2,4,6-trioxide 2931.47 (5-Ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphinan-5-yl) methyl methyl methylphosphonate 2931.48 3,9-Dimethyl-2,4,8,10-tetraoxa-3,9-diphosphaspiro [5.5] undecane 3,9-dioxide 2931.49 Other 2931.51 Methylphosphonic dichloride 2931.52 Propylphosphonic dichloride

Sources: U.S. International Trade Commission, Harmonized Tariff Schedule (public domain) · EU Combined Nomenclature © European Union, Eurostat (Decision 2011/833/EU) · UK Integrated Online Tariff, contains public sector information licensed under the Open Government Licence v3.0. Data refreshed weekly. Details on About & Data Sources.