# European Union tariff lines under HS 2931.90

> The European Union tariff splits HS 2931.90 (other organo-inorganic compounds) into 15 national lines: 2931 90 00 15 (methylcyclopentadienyl manganese tricarbonyl (CAS RN 12108-13-3) containing not more than 4,9 % by weight of cyclopentadienyl manganese tricarbonyl), 2931 90 00 21 ((2-Fluoro-4-phenoxyphenyl)boronic acid (CAS RN 1414356-30-1) with a purity by weight of 95 % or more), 2931 90 00 23 (ixazomib citrate (INNM) (CAS RN 1239908-20-3) with a purity by weight of 95 % or more), 2931 90 00 28 (triethoxy(3-isocyanatopropyl)silane (CAS RN 24801-88-5) with a purity by weight of 96 % or more) and 11 others.

Source: https://border.bot/countries/european-union/hs-codes/293190
Last updated: 11 October 2026

[Countries](https://border.bot/countries) / [European Union](https://border.bot/countries/european-union) / [Chapter 29](https://border.bot/countries/european-union/hs-codes/29) / [2931.90](https://border.bot/countries/european-union/hs-codes/293190)

## Key facts

- HS subheading: [2931.90](https://border.bot/hs-codes/293190)
- National lines: 15
- Import VAT/GST in the European Union: VAT 21%
- De minimis in the European Union: Flat €3 duty up to €150; tax always charged
- Tariff: [European Union](https://border.bot/countries/european-union)
- Chapter: 29: Organic chemicals

## European Union lines under 2931.90

The European Union tariff splits HS 2931.90 (other organo-inorganic compounds) into 15 national lines: 2931 90 00 15 (methylcyclopentadienyl manganese tricarbonyl (CAS RN 12108-13-3) containing not more than 4,9 % by weight of cyclopentadienyl manganese tricarbonyl), 2931 90 00 21 ((2-Fluoro-4-phenoxyphenyl)boronic acid (CAS RN 1414356-30-1) with a purity by weight of 95 % or more), 2931 90 00 23 (ixazomib citrate (INNM) (CAS RN 1239908-20-3) with a purity by weight of 95 % or more), 2931 90 00 28 (triethoxy(3-isocyanatopropyl)silane (CAS RN 24801-88-5) with a purity by weight of 96 % or more) and 11 others.

- [2931 90 00 15](https://border.bot/countries/european-union/hs-codes/2931900015) Other, Methylcyclopentadienyl manganese tricarbonyl (CAS RN 12108-13-3) containing not more than 4,9 % by weight of cyclopentadienyl manganese tricarbonyl. Duty (MFN): 6.5%
- [2931 90 00 21](https://border.bot/countries/european-union/hs-codes/2931900021) Other, (2-Fluoro-4-phenoxyphenyl)boronic acid (CAS RN 1414356-30-1) with a purity by weight of 95 % or more. Duty (MFN): 6.5%
- [2931 90 00 23](https://border.bot/countries/european-union/hs-codes/2931900023) Other, Ixazomib citrate (INNM) (CAS RN 1239908-20-3) with a purity by weight of 95 % or more. Duty (MFN): 6.5%
- [2931 90 00 28](https://border.bot/countries/european-union/hs-codes/2931900028) Other, Triethoxy(3-isocyanatopropyl)silane (CAS RN 24801-88-5) with a purity by weight of 96 % or more. Duty (MFN): 6.5%
- [2931 90 00 30](https://border.bot/countries/european-union/hs-codes/2931900030) Other, Tert-Butylchlorodimethylsilane (CAS RN 18162-48-6) with a purity by weight of 99 % or more. Duty (MFN): 6.5%
- [2931 90 00 38](https://border.bot/countries/european-union/hs-codes/2931900038) Other, 2-(Trimethylsilyl)ethoxymethyl chloride (CAS RN 76513-69-4) with a purity by weight of 98 % or more. Duty (MFN): 6.5%
- [2931 90 00 40](https://border.bot/countries/european-union/hs-codes/2931900040) Other, Chlorotrimethylsilane (CAS RN 75-77-4) with a purity by weight of 98 % or more. Duty (MFN): 6.5%
- [2931 90 00 43](https://border.bot/countries/european-union/hs-codes/2931900043) Other, Trimethylindium (CAS RN 3385-78-2) with a purity by weight of 99 % or more. Duty (MFN): 6.5%
- [2931 90 00 48](https://border.bot/countries/european-union/hs-codes/2931900048) Other, 4-Phenoxybenzeneboronic acid (CAS RN 51067-38-0) with a purity by weight of 98 % or more. Duty (MFN): 6.5%
- [2931 90 00 50](https://border.bot/countries/european-union/hs-codes/2931900050) Other, Trimethylsilane (CAS RN 993-07-7). Duty (MFN): 6.5%
- [2931 90 00 55](https://border.bot/countries/european-union/hs-codes/2931900055) Other, 3-(Hydroxymethyl)phenylboronic acid (CAS RN 87199-15-3) with a purity by weight of 95 % or more. Duty (MFN): 6.5%
- [2931 90 00 58](https://border.bot/countries/european-union/hs-codes/2931900058) Other, Trimethylgallium (CAS RN 1445-79-0) with a purity by weight of 99 % or more. Duty (MFN): 6.5%
- [2931 90 00 68](https://border.bot/countries/european-union/hs-codes/2931900068) Other, Hydrogen tetrakis(pentafluorophenyl)borate(1-)-N,N-dimethylaniline (1:1) (CAS RN 118612-00-3) with a purity by weight of 99 % or more. Duty (MFN): 6.5%
- [2931 90 00 75](https://border.bot/countries/european-union/hs-codes/2931900075) Other, Hexadecyltrimethoxysilane (CAS RN 16415-12-6) with a purity by weight of at least 95 %, for use in the manufacture of polyethylene. Duty (MFN): 6.5%
- [2931 90 00 90](https://border.bot/countries/european-union/hs-codes/2931900090) Other

## Import VAT and de minimis in the European Union

The European Union charges VAT on imports at a standard rate of 21%.

From 1 July 2026 until 1 July 2028, consignments sold to buyers in the European Union worth up to €150 pay a flat customs duty of €3 per tariff classification in the consignment instead of the tariff rate. Import tax is charged whatever the value.

## In other countries

National tariff lines under 2931.90 are live on border.bot for the United States (16 lines, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/293190): 16 lines, used by 1 other country
- [The Harmonized System text for 2931.90](https://border.bot/hs-codes/293190)

- Previous subheading: [2931.59](https://border.bot/countries/european-union/hs-codes/293159) Other
- Next subheading: [2932.11](https://border.bot/countries/european-union/hs-codes/293211) Compounds containing an unfused furan ring (whether or not hydrogenated) in the structure

## Frequently asked questions

### How many national tariff lines does the European Union tariff have under HS 2931.90?

The European Union tariff splits HS 2931.90 (other organo-inorganic compounds) into 15 national lines: 2931 90 00 15 (methylcyclopentadienyl manganese tricarbonyl (CAS RN 12108-13-3) containing not more than 4,9 % by weight of cyclopentadienyl manganese tricarbonyl), 2931 90 00 21 ((2-Fluoro-4-phenoxyphenyl)boronic acid (CAS RN 1414356-30-1) with a purity by weight of 95 % or more), 2931 90 00 23 (ixazomib citrate (INNM) (CAS RN 1239908-20-3) with a purity by weight of 95 % or more), 2931 90 00 28 (triethoxy(3-isocyanatopropyl)silane (CAS RN 24801-88-5) with a purity by weight of 96 % or more) and 11 others.

## Sources and updates

The tariff lines for the European Union come from border.bot release 1, read from the publisher’s files, and have been live since 11 October 2026.

The duty rates for the European Union come from border.bot release 1, read from the publisher’s files, and have been live since 11 October 2026.

The trade programmes for the European Union come from border.bot release 1, read from the publisher’s files, and have been live since 11 October 2026.

The import taxes for the European Union come from border.bot release 1, imported from a file, and have been live since 9 October 2026.

The de minimis thresholds for the European Union come from border.bot release 2, entered by border.bot, and have been live since 11 October 2026.

This page was last updated on 11 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

Official source files:

- https://circabc.europa.eu/sd/a/9e277705-ac42-441d-8580-90cd730d9bc6/Geographical%20areas%20composition.xlsx
- https://circabc.europa.eu/sd/a/bfb94607-8b4c-40c3-ad33-1efef11bb80a/Duties%20Import%2001-99.xlsx
- https://circabc.europa.eu/sd/a/4b3c682c-947c-4f34-932d-0b8d192537bd/Measure%20exclusions.xlsx
- https://circabc.europa.eu/sd/a/13694f84-6980-4966-8c91-22459447b52b/Nomenclature%20EN.xlsx

Machine-readable: https://border.bot/countries/european-union/hs-codes/293190.json