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Code 3913 90 00 · Subheading 3913 90

Final code reached

Unprocessed natural and modified natural polymers, excluding alginic acid and its salts and esters

This is a complete 8-digit customs code. There is no further code choice to make below it.

This covers natural polymers and modified natural polymers in unprocessed form, including hardened proteins and chemical derivatives of natural rubber. It does not cover alginic acid or its salts and esters.

For example

  • Unprocessed hardened casein, a hardened protein that is not alginic acid or a salt or ester of alginic acid
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See the official tariff text

Official tariff text

Natural polymers and modified natural polymers, e.g. hardened proteins, chemical derivatives of natural rubber, n.e.s., in primary forms (excl. alginic acid and its salts and esters)

Classification complete

3913 90 00

Unprocessed natural and modified natural polymers, excluding alginic acid and its salts and esters

The spaces only make the code easier to read. Customs declarations normally use the unspaced form, 39139000.

See how EU customs ruled on similar products

Trade measures to be aware of

Besides the ordinary duty, the EU records these kinds of measure against this code. They are listed as signals only: whether one applies to your goods can depend on where they come from, who produced them, the exact product and the documents you present. No amounts are worked out here.

  • Lower duty for goods from some countries

    Preferential rates exist for goods originating in Andorra; San Marino; Türkiye; Economic Partnership Agreements; CARIFORUM except Haiti; Comoros (excluding Mayotte), Madagascar, Mauritius, Seychelles and dependencies and Zimbabwe; Botswana, Eswatini, Lesotho, Mozambique and Namibia; Western Sahara; 52 more origins. Whether you can use one depends on the origin rules for the goods and on the documentation you can show.

    Check this code in the official EU TARIC database

  • A limited quantity at a lower rate

    A tariff quota is recorded for this code. This does not say whether any of the quota is still available. It covers goods originating in any country except Belarus and Russian Federation.

    This is recorded on a more detailed code below this one, so it may not cover your goods.

    Check this code in the official EU TARIC database

  • Restrictions and paperwork

    Import restrictions are recorded for goods originating in Ukraine; any country; any country except Andorra, Faroe Islands, Greenland, Iceland, Liechtenstein, Norway, San Marino and Switzerland; European Union; Faroe Islands; Greenland; China.

    Document or certificate conditions are recorded. Customs may ask for:

    • Invoice declaration or origin declaration made out by any exporter on invoice or any other commercial document
    • Goods not originating from or destined to Crimea or Sevastopol (Articles 2 and 2b.1 of Council Regulation (EU) No 692/2014)
    • Movement certificate EUR.1
    • Goods not originating from or not destined for the non-government controlled areas of Ukraine in the oblasts of Donetsk, Kherson, Luhansk and Zaporizhzhia
    • Goods other than those falling under the applicable provisions of Regulation (EU) 2024/573
    • Products and equipment, including parts (excluding military and repair exemption) listed in Annex IV containing F-gases or relies upon F-gases not subject to prohibition as imposed by Article 11.1. (Reg 2024/573).
    Show all 34 document conditions
    • Net mass of fluorinated greenhouse gases charged in products and equipment
    • Undertaking registered in the F-Gas Portal according to Article 20 of Regulation (EU) 2024/573
    • Goods labelled according to the provisions of Article 12 of Regulation (EU) 2024/573
    • Tonnes of CO₂ equivalent of bulk gases and of gases contained in products or equipment, and parts thereof
    • Goods with third country origin coming from Norway, according to the relevant EU legislation.
    • Goods with third country origin coming from San Marino, according to the relevant EU legislation.
    • Common Health Entry Document for Products (CHED-P) (as set out in Part 2, Section B of Annex II to Commission Implementing Regulation (EU) 2019/1715 (OJ L 261))
    • Exemption by virtue of Article 7 of Commission Delegated Regulation 2019/2122 (Goods which form part of passengers' personal luggage and are intended for personal consumption or use) or Article 10 (small consignments of goods sent to natural persons which are not intended to be placed on the market) of Commission Delegated Regulation 2019/2122
    • The declared goods are not concerned by Commission Implementing Regulation (EU) 2021/632
    • Exemption by virtue of Articles 3 and 4 of regulation 2019/2122 (animals intended for scientific purposes, research and diagnostic samples, and samples for product analysis and quality testing).
    • Goods with third country origin coming from Andorra, according to the relevant EU legislation.
    • Goods with third country origin coming from Switzerland, according to the relevant EU legislation.
    • Goods with third country origin coming from Iceland, according to the relevant EU legislation.
    • Goods with third country origin coming from Liechtenstein, according to the relevant EU legislation.
    • Goods with EU origin returning from Norway, according to the relevant EU legislation
    • Goods with EU origin returning from San Marino, according to the relevant EU legislation
    • Goods with EU origin returning from Iceland, according to the relevant EU legislation
    • Goods with EU origin returning from Lichtenstein, according to the relevant EU legislation
    • Goods with EU origin returning from Andorra, according to the relevant EU legislation
    • Goods with EU origin returning from Switzerland, according to the relevant EU legislation
    • Goods with EU origin coming from outermost regions, according to the relevant EU legislation
    • Information document accompanying shipments of waste as mentioned in Regulation (EU) 2024/1157 – Article 18 and Annex VII
    • Movement document as mentioned in Regulation (EU) 2024/1157 – Article 5 and Annex IB
    • Product not subjected to the provisions of Regulation (EU) 2024/1157
    • Notification document as mentioned in Regulation (EU) 2024/1157 - Article 5 and Annex IA
    • The declared goods are not concerned by Commission Implementing Regulation (EU) 2019/1793
    • Exemption by virtue paragraph 3 of Article 1 of Regulation (EU) 2019/1793
    • Common Health Entry Document for Feed and Food of Non-Animal Origin (CHED-D) (as set out in Part 2, Section D of Annex II to Commission Implementing Regulation (EU) 2019/1715 (OJ L 261))
    Check this code in the official EU TARIC database

EU tariff measure data version 2026-08-03-tullverket.

Export to Norway

What Norwegian customs charges when goods like these are imported into Norway.

  • 39.13.9000

    Other

    Ordinary duty
    Duty free
    Goods of EU origin
    Duty free You need documentation of EU origin to use this rate.

Norwegian tariff data version 1.5/1.2, last checked Aug. 3, 2026.

Contains data from Norwegian Customs (data.toll.no), licensed under CC BY 4.0, adapted for display.

Export to the United Kingdom

What UK customs charges when goods like these are imported into the UK.

  • 3913 90 00 20

    Poly(hydroxyalkanoate), predominantly consisting of poly(3-hydroxybutyrate)

    Ordinary duty
    Duty free
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 3913 90 00 40

    Xanthan gum

    Ordinary duty
    Duty free
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 3913 90 00 85

    Sterile sodium hyaluronate (CAS RN 9067-32-7)

    Ordinary duty
    Duty free
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 3913 90 00 87

    With:<br>- a weight average molecular weight (Mw) of not more than 900 000, <br>- an endotoxin level of not more than 0,008 Endotoxin units (EU)/mg, <br>- an ethanol content of not more than 1% by weight, <br>- an isopropanol content of not more than 0,5% by weight

    Ordinary duty
    Duty free
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 3913 90 00 88

    Other

    Ordinary duty
    Duty free
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 3913 90 00 95

    Chondroitinsulphuric acid, sodium salt (CAS RN 9082-07-9)

    Ordinary duty
    Duty free
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

  • 3913 90 00 99

    Other

    Ordinary duty
    Depends on the product details
    Goods of EU origin
    Duty free You need documentation of EU preferential origin to use this rate.

These rates apply in Great Britain. Different rules may apply for goods entering Northern Ireland.

UK tariff data version v4.0.1576, last checked Aug. 3, 2026.

Contains public sector information licensed under the Open Government Licence v3.0.

Source: UK Department for Business and Trade (data.api.trade.gov.uk).

Before you use the code

Check the facts that sit outside the code

The code can be right while what you pay still changes, because of where the goods come from, when they arrive, or extra EU measures.

Classify your own product, free Look up the current rates and rules
  1. The product and its form Check that your product really matches this description, including what it is made of and the form it arrives in.
  2. Country of origin Trade agreements, sanctions and extra measures can change the treatment of the very same code.
  3. Current tariff measures Check today's rate, any restrictions or licences, and the quantity customs asks for, with SKAT or TARIC.

Worth comparing

Codes that sit close to this one, for when the material itself could be different.

Browse chapter 39

Similar products elsewhere in the tariff

Often confused with

Duty rates shown here are estimates, read from official EU / Danish, Norwegian and UK tariff data for orientation only. Confirm the current rate with SKAT, TARIC, Norwegian Customs or the UK Online Trade Tariff before you file. The rate you pay can also depend on the country of origin. These are base customs duties only: import VAT, excise duties, anti-dumping duties and safeguard or quota measures are not included.