Code 3913 10 · Heading 3913

Unprocessed alginic acid, its salts and esters

This code covers alginic acid, its salts and its esters in unprocessed form. It is separate from other natural or modified polymers in unprocessed form.

For example

Unprocessed alginic acid
Unprocessed salts of alginic acid
Unprocessed esters of alginic acid

See the official tariff text

Official tariff text

Alginic acid, its salts and esters, in primary forms

How we got to this code

VII
39
3913
3913 10

Show the steps

The path to this code

Every code is reached through these choices, one level at a time.

Step 4 of 4

Step 1 · Section VII Plastics and articles thereof; rubber and articles …
Is the product made of plastic, or is it made of rubber?
✓
Step 2 · Chapter 39 Plastics and articles thereof 1 of 2 chapters in section VII
What kind of plastic product is it: an unworked polymer or ion exchanger, plastic waste, a monofilament, rod or profile, a pipe or hose, a floor or wall covering, a flat plastic form, a sanitary item, a transport or packaging item, a household or toilet item, building equipment, or another plastic article?
✓
Step 3 · Heading 3913 Natural polymers, e.g. alginic acid, and modified n… 13 of 26 headings under chapter 39
Is it alginic acid, a salt of alginic acid or an ester of alginic acid?
✓
Step 4 · Subheading 3913 10 Alginic acid, its salts and esters, in primary forms 1 of 2 subheadings under heading 3913
Is it alginic acid, a salt of alginic acid or an ester of alginic acid, in unprocessed form?

Pick the 8-digit code

Import duty on the codes below: 5.0%

Only one code below

3913 10 00

Alginic acid, its salts and esters, in primary forms

5.0%

This subheading has one 8-digit code, so that is the code to use.

Open 3913 10 00 Save

Compare the sibling codes

See all 2 codes at this level

3913 10 Alginic acid, its salts and esters, in primary forms you are here 5.0%
3913 90 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) 6.5%

Selling to Norway, Great Britain and the United States

What they charge on arrival.

Norway, Great Britain and the United States use their own tariff lines under the 6-digit HS code. The rates below are what their customs charge on goods arriving from the EU. Match the goods against each country's own wording before you rely on a rate.

Norway

Duty free

Their lines1 Norwegian line

39.13.1000 Alginic acid, its salts and esters

Norwegian tariff data checked Sept. 13, 2026.

Great Britain

Duty free

Their lines2 British lines

3913 10 00 20 Sodium alginate extracted from brown seaweed, with - a loss on drying of not more than 15

Northern Ireland follows other rules.

UK tariff data checked Sept. 13, 2026.

United States

10.0%

Estimated from published US measures

Their lines1 US line
Entry dateSept. 17, 2026

3913.10.00.00 Natural polymers (for example, alginic acid) and modified natural polymers

The US importer of record files the entry.

US tariff data checked Sept. 16, 2026.

See the 1 Norwegian line

Selling to Norway

Norway splits the 6-digit category its own way, so these are Norway's own lines under it, not this EU code. Check your product against their wording; what Norwegian customs charges is shown per line.

39.13.1000

Alginic acid, its salts and esters

Ordinary duty

Duty free

Norwegian tariff data version 1.5/1.2, last checked Sept. 13, 2026.

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

See the 2 British lines

Selling to Great Britain

What UK customs charges when goods like these arrive in Great Britain.

All 2 UK lines under this code

They all have the same duty rates shown here.

Ordinary duty

Duty free

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

UK tariff data version v4.0.1599, last checked Sept. 13, 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).

See the 1 US line

Selling to the United States

What US customs charges when goods like these arrive from the EU. The US importer of record files the entry and pays the duty.

3913.10.00.00

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, Alginic acid, its salts and esters

General rate

4.2%

From the EU

10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

Worked out for an entry on Sept. 17, 2026.

US tariff schedule 2026HTSRev19, last checked Sept. 16, 2026.

Last change we recorded: Revision 19 (2026), Sept. 16, 2026.

Anti-dumping and countervailing duties, US import taxes and customs fees are not included.

The descriptions above are the US tariff texts, which the United States publishes in English only.

Source: the US International Trade Commission's Harmonized Tariff Schedule (hts.usitc.gov), public domain, and the measures published in the Federal Register.

This is a planning estimate from the US Harmonized Tariff Schedule (revision shown) and the published Federal Register measures as of the date shown, for a shipment of EU origin. It is not a customs entry, legal advice or a broker's opinion, and tariffs.help is not a US-licensed customs broker. The US importer of record or their broker confirms the classification, origin, value and the duty due before filing.

Duty rates shown here are estimates, read from official EU / Danish, Norwegian and UK tariff data for orientation only. Confirm the current rate with Toldstyrelsen, 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.