The Combined Nomenclature (CN) classification of algae and algal products has significant implications for import duties, trade statistics, market authorisations and labelling requirements. This chapter covers the CN classification framework, the specific headings relevant to algae, the CN/NACE classification tension (covered also in Aquaculture and Wild Harvesting and Agriculture and Land-based Cultivation), import conditions for algae from third countries, and the trade policy context.

Council Regulation (EEC) No 2658/87 of 23 July 1987 on the tariff and statistical nomenclature and on the Common Customs Tariff, OJ L 256, 7.9.1987, p. 1, EURlex implemented annually by Commission Implementing Regulations.

The Combined Nomenclature (CN) is the EU's goods classification system, serving simultaneously as the basis for the Common Customs Tariff (import duties), EU external trade statistics, and various EU policy instruments (agricultural market measures, import controls). The CN is updated annually; the current version is Commission Implementing Regulation (EU) 2025/1926. EUR-Lex

The CN is organised hierarchically: Sections → Chapters → Headings (4-digit) → Subheadings (6- or 8-digit). Classification of a product determines its customs duty rate on import into the EU.

Algae are classified as vegetable products under Section II (Vegetable Products), Chapter 12 (“Oil seeds and oleaginous fruits; miscellaneous grains, seeds and fruit; industrial or medicinal plants; straw and fodder”). The specific heading is:

Heading 1212 — Locust beans, seaweeds and other algae, sugar beet and sugar cane, fresh, chilled, frozen or dried, whether or not ground; fruit stones and kernels and other vegetable products (including unroasted chicory roots of the variety Cichorium intybus sativum) of a kind used primarily for human consumption, not elsewhere specified or included.

Specific subheadings for algae (CN 2025):

• 1212 21 00 — Seaweeds and other algae — fit for human consumption
• 1212 29 00 — Seaweeds and other algae — other (i.e. not fit for human consumption)

This two-subheading structure reflects the distinction between food-grade algae (for human consumption) and other uses (feed, industrial, fertiliser). The classification of a batch under 1212 21 00 vs. 1212 29 00 depends on the intended use and quality standard of the specific consignment.

For the purposes of heading 1212, “seaweeds and other algae” explicitly does not include:

• Dead single-cell micro-organisms of heading 2102 (yeasts, dead; single-cell micro-organisms, dead; prepared baking powders).
• Cultures of micro-organisms of heading 3002 (human blood; animal blood prepared for therapeutic, prophylactic or diagnostic uses; animal serums; toxins, cultures of micro-organisms except yeasts and similar).
• Fertilisers of heading 3101 (animal or vegetable fertilising products, whether or not mixed together or chemically treated) or 3105 (mineral or chemical fertilisers containing two or three of the fertilising elements nitrogen, phosphorus and potassium).

These exclusions create important classification decisions for algae producers:

• Dried microalgae (e.g. Chlorella or Spirulina powder) for food use: classified under 1212 21 00.
• Dead single-cell microalgae (e.g. heat-killed Chlorella used as a culture starter or probiotic adjunct): may fall under 2102.
• Live microalgae cultures for research or cultivation purposes: may fall under 3002.
• Algae-based fertilisers: may fall under 3101 or 3105 depending on formulation, potentially with different duty rates.

Seaweeds and algae that have been prepared or preserved by processes not covered by Chapter 12 — such as cooking, roasting, seasoning, or adding sugar — fall into Chapter 20 (preparations of vegetables, fruit, nuts or other parts of plants). This is relevant for:

• Ready-to-eat seasoned nori sheets (salted, toasted, flavoured).
• Seaweed salads with dressing.
• Other algae preparations going beyond drying/grinding.

The CN chapter for preparations of vegetables carries different duty rates from raw/dried seaweed, and the move to Chapter 20 may also affect the applicable food law framework (product-specific rules under the Processed Fruit and Vegetables Regulation rather than the primary agricultural product rules).

Specific algae-derived ingredients are classified under different chapters:

• Alginates (E400–E405): classified under heading 1302 (plant saps and extracts) or 3913 (natural polymers), depending on form and purity.
• Carrageenan (E407): classified under heading 1302.
• Agar (E406): heading 1302.
• Algal oils (DHA/EPA oils): heading 1515 (other fixed vegetable or microbial fats and oils) or 1517 depending on formulation.
• Algal pigments (phycocyanin, astaxanthin, β-carotene): heading 3204 (synthetic organic colourants) or 1302 depending on form and use.
• Algae-based fertilising products and biostimulants: headings 3101, 3105 or 3002 depending on formulation.

Correct CN classification is essential for:

• Determining the customs duty rate on import.
• Applying for any relevant customs tariff suspension or quota.
• Complying with trade statistics reporting obligations.
• Ensuring that any import conditions (food safety controls, phytosanitary certificates) associated with the specific CN code are satisfied.

Algae imported from third countries must comply with EU food safety rules in the same way as EU-produced algae. Additional import-specific controls include:

Regulation (EU) 2017/625 on official controls (see Production, Processing and Hygiene — General) establishes the framework for official controls on goods entering the EU. For algae and algal products imported from third countries:

• Consignments may be subject to identity checks, document checks, and physical checks (including sampling and laboratory testing) at Border Inspection Posts (BIPs) or Designated Points of Entry (DPEs).
• Commission implementing acts specify the frequency of physical checks for various categories of food, based on risk assessment. Algae products from some origins are subject to elevated check frequencies following RASFF alerts.

Imported algae and algal products must comply with EU maximum levels for contaminants (Regulation (EU) 2023/915) and any other applicable food safety requirements. Heavy metals (cadmium, lead, mercury, inorganic arsenic) are the most common basis for RASFF alerts for imported algae products, particularly those from Asian production origins.

Regulation (EU) 2016/2031 of the European Parliament and of the Council on protective measures against pests of plants establishes phytosanitary import requirements EURlex. Algae are “plants” for phytosanitary purposes, and some categories of imported fresh or minimally processed algae may require phytosanitary certificates. Producers importing live algae cultures, fresh macroalgae, or seed stock from third countries should check applicable phytosanitary requirements.

Algae, as aquacultural products, must be labelled in accordance with the aquacultural labelling rules. This means that Origin and Production Method Labelling for Aquaculture Products is mandatory according to Regulation No 1379/2013. This requirement is not tested at the import, but may be tested &enforced at any time when product is on the market. See Food Labelling for details.

A persistent classification ambiguity for the algae sector arises from the divergence between the CN (which classifies algae under Chapter 12 as vegetable products) and the NACE economic activity classification (which assigns algae production under Division 03 — Aquaculture). This creates regulatory consequences:

• For purposes of EU agricultural policy (CAP), algae are not classified as agricultural products and are generally ineligible for direct payments.
• For purposes of EU organic regulation (Regulation (EU) 2018/848), algae are treated as agricultural products within the meaning of the CN (Chapter 12) but regulated under the aquaculture chapter of the Regulation.
• For customs purposes, the CN classification as vegetables means that some preferential tariff arrangements applicable to fishery products (which might logically cover aquaculture products) do not apply to algae.
• For trade statistics and EMFAF funding eligibility, the NACE aquaculture classification governs.

This dual classification is an inherent regulatory ambiguity arising from algae's position between plant biology (CN) and aquatic production (NACE), and is not likely to be resolved by a single legislative intervention. Producers and traders must navigate it according to which regulatory framework is in play for the specific transaction.

• Verify the correct CN code for every product before import or export — misclassification creates duty liability, and the CN code also determines which import controls apply.
• For multi-ingredient algae preparations, classification depends on the “essential character” of the product; expert customs advice is recommended where the classification is not obvious.
• Check contaminant levels before import — heavy metal testing is essential for any algae product from Asian production origins, and results should be available before the consignment arrives at the EU border.
• Phytosanitary certificates may be required for fresh macroalgae imports; check requirements with the competent authority in the importing member state.
• RASFF monitoring — monitor the RASFF notification database for alerts on algae products from your sourcing regions; elevated check frequencies follow from recent alerts and affect commercial planning.

See also: Aquaculture and Wild Harvesting | Agriculture and Land-based Cultivation | Food Quality and Safety | Fertiliser Product Regulation

Last reviewed: June 2026.