# European Union tariff lines under HS 3913.90

> The European Union tariff splits HS 3913.90 (natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms) into 7 national lines: 3913 90 00 20 (poly(hydroxyalkanoate), predominantly consisting of poly(3-hydroxybutyrate)), 3913 90 00 40 (xanthan gum), 3913 90 00 85 (sterile sodium hyaluronate (CAS RN 9067-32-7)), 3913 90 00 87 (with: - a weight average molecular weight (Mw) of not more than 900 000, - an endotoxin level of not more than 0,008 Endotoxin units (EU)/mg, - an ethanol content of not more than 1% by weight, - an isopropanol content of not more than 0,5% by weight) and 3 others.

Source: https://border.bot/countries/european-union/hs-codes/391390
Last updated: 11 October 2026

[Countries](https://border.bot/countries) / [European Union](https://border.bot/countries/european-union) / [Chapter 39](https://border.bot/countries/european-union/hs-codes/39) / [3913.90](https://border.bot/countries/european-union/hs-codes/391390)

## Key facts

- HS subheading: [3913.90](https://border.bot/hs-codes/391390)
- National lines: 7
- 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: 39: Plastics and articles thereof

## European Union lines under 3913.90

The European Union tariff splits HS 3913.90 (natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms) into 7 national lines: 3913 90 00 20 (poly(hydroxyalkanoate), predominantly consisting of poly(3-hydroxybutyrate)), 3913 90 00 40 (xanthan gum), 3913 90 00 85 (sterile sodium hyaluronate (CAS RN 9067-32-7)), 3913 90 00 87 (with: - a weight average molecular weight (Mw) of not more than 900 000, - an endotoxin level of not more than 0,008 Endotoxin units (EU)/mg, - an ethanol content of not more than 1% by weight, - an isopropanol content of not more than 0,5% by weight) and 3 others.

- [3913 90 00 20](https://border.bot/countries/european-union/hs-codes/3913900020) Other, Poly(hydroxyalkanoate), predominantly consisting of poly(3-hydroxybutyrate). Duty (MFN): 6.5%
- [3913 90 00 40](https://border.bot/countries/european-union/hs-codes/3913900040) Other, Xanthan gum. Duty (MFN): 6.5%
- [3913 90 00 85](https://border.bot/countries/european-union/hs-codes/3913900085) Other, Sodium hyaluronate, Sterile sodium hyaluronate (CAS RN 9067-32-7). Duty (MFN): 6.5%
- [3913 90 00 87](https://border.bot/countries/european-union/hs-codes/3913900087) Other, Sodium hyaluronate, Non sterile, With: - a weight average molecular weight (Mw) of not more than 900 000, - an endotoxin level of not more than 0,008 Endotoxin units (EU)/mg, - an ethanol content of not more than 1% by weight, - an isopropanol content of not more than 0,5% by weight. Duty (MFN): 6.5%
- [3913 90 00 88](https://border.bot/countries/european-union/hs-codes/3913900088) Sodium hyaluronate, Non sterile, Other. Duty (MFN): 6.5%
- [3913 90 00 95](https://border.bot/countries/european-union/hs-codes/3913900095) Other, Chondroitinsulphuric acid, sodium salt (CAS RN 9082-07-9). Duty (MFN): 6.5%
- [3913 90 00 99](https://border.bot/countries/european-union/hs-codes/3913900099) 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 3913.90 are live on border.bot for the United States (4 lines, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/391390): 4 lines, used by 1 other country
- [The Harmonized System text for 3913.90](https://border.bot/hs-codes/391390)

- Previous subheading: [3913.10](https://border.bot/countries/european-union/hs-codes/391310) Alginic acid, its salts and esters
- Next subheading: [3914.00](https://border.bot/countries/european-union/hs-codes/391400) Ion-exchangers based on polymers of headings 3901 to 3913, in primary forms

## Frequently asked questions

### How many national tariff lines does the European Union tariff have under HS 3913.90?

The European Union tariff splits HS 3913.90 (natural polymers (for example, alginic acid) and modified natural polymers (for example, hardened proteins, chemical derivatives of natural rubber), not elsewhere specified or included, in primary forms) into 7 national lines: 3913 90 00 20 (poly(hydroxyalkanoate), predominantly consisting of poly(3-hydroxybutyrate)), 3913 90 00 40 (xanthan gum), 3913 90 00 85 (sterile sodium hyaluronate (CAS RN 9067-32-7)), 3913 90 00 87 (with: - a weight average molecular weight (Mw) of not more than 900 000, - an endotoxin level of not more than 0,008 Endotoxin units (EU)/mg, - an ethanol content of not more than 1% by weight, - an isopropanol content of not more than 0,5% by weight) and 3 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/391390.json