Regulation (EC) No 1907/2006 on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH) and Regulation (EC) No 1272/2008 on Classification, Labelling and Packaging of Substances and Mixtures (CLP) are the two foundational pieces of EU chemicals legislation. Together they determine whether and how chemical substances — including many algae-derived compounds — may be manufactured, imported, placed on the EU market, and supplied. REACH and CLP are managed by the European Chemicals Agency (ECHA) in Helsinki and apply in parallel with sector-specific legislation such as food law, cosmetics regulation, and the detergents framework.

This chapter provides an overview of REACH and CLP as they apply to the algae sector. Specific REACH interfaces for individual downstream applications are addressed in the relevant chapters: see Detergents for surfactant registration, Textiles for hazardous substance restrictions in textile processing, and Greenhouse Gases and Climate for PFAS developments.

• Regulation (EC) No 1907/2006 (REACH) EURlex — consolidated text. Covers registration, evaluation, authorisation and restriction of chemical substances.
• Regulation (EC) No 1272/2008 (CLP) EURlex, Direct link — Covers classification, labelling and packaging of substances and mixtures; implements the UN GHS in the EU.
• Commission Regulation (EU) 2015/830 on Safety Data Sheet format EURlex — specifies the 16-section SDS format required under REACH Article 31; note: SDS format requirements have been updated by subsequent amendments — verify the current consolidated version on EUR-Lex.
• ECHA Guidance documents — non-binding but authoritative technical guidance on REACH registration, substance identity, and the natural substance exemptions; available at ECHA website.

REACH applies to substances on their own, in mixtures (such as formulated products), or in articles (such as textiles or consumer goods). It covers substances manufactured in the EU at or above one tonne per year and substances imported into the EU in those quantities, regardless of whether they are organic, inorganic, synthetic, or naturally derived.

For algae producers and processors, REACH is potentially relevant in several contexts:

• Algae-derived chemical compounds (pigments, fatty acids, polysaccharides, surfactants, solvents, extracts) placed on the market as distinct substances.
• Processing chemicals used during algae extraction and refinement — solvents, flocculants, preservatives — which are typically already registered by their supplier, but whose supply must be accompanied by a Safety Data Sheet.
• Articles containing algae-derived materials — such as textiles incorporating algae-derived fibres or dyes — which must comply with REACH Annex XVII restrictions on hazardous substances and SVHC disclosure obligations.

REACH does not apply to radioactive substances, to substances under customs supervision in transit, or to certain categories of substances explicitly listed in Annexes IV and V (see below on exemptions).

REACH Annex V, Entry 8 exempts from registration requirements “Substances that occur in nature, if they are not chemically modified”, provided they are not dangerous within the meaning of the Dangerous Substances Directive and do not meet PBT/vPvB criteria. This is the principal exemption potentially available to algae-derived materials.

What counts as “not chemically modified” is defined in Article 3(40): a chemically modified substance is one that has undergone a chemical reaction whereby a new substance is intentionally formed. Physical processes — drying, milling, centrifugation, filtration, evaporation, extraction with permitted solvents that are subsequently removed — do not constitute chemical modification in ECHA's interpretation; consequently, dried or milled algal biomass, algal biomass extract (where the extract retains the same chemical composition as the plant material), or concentrated algal oil that is simply pressed or centrifuged may qualify as not chemically modified.

However, the exemption must be assessed substance by substance. Enzymatic hydrolysis, acid/base extraction, or chemical derivatisation (e.g. esterification, acetylation, sulphation) creates a new substance that does not qualify. In practice:

• Dried whole algal biomass — likely exempt under Annex V/8 if not classified as hazardous.
• Aqueous algal extracts obtained by hot water extraction — likely exempt, substance identity must be established.
• Algal oil cold-pressed or hexane-extracted, solvent fully removed — likely exempt, but verify substance identity matches what ECHA guidance describes as UVCB (Unknown or Variable composition, Complex reaction products or Biological materials).
• Agar, carrageenan, alginate produced by hot-water extraction and precipitation/drying — long-established substances with existing registrations in the EU, available for downstream formulators to use without their own registration.
• Chemically sulphated polysaccharides, alginate esters, chemically modified phycocyanin — new substances requiring assessment and likely registration.

When in doubt, pre-registration consultation with ECHA (using the ECHA inquiry submission procedure) is advisable before commercial scale-up.

Where no exemption applies and a substance is manufactured or imported at one tonne per year or above, registration with ECHA is required before placing the substance on the market. Key features:

• Tonnage thresholds determine the depth of information required: 1–10 t/year (minimum physicochemical and eco-toxicological data), 10–100 t/year (standard information set), 100–1000 t/year (extended standard information set), above 1000 t/year (full standard information set including reproductive toxicity and long-term environmental fate studies).
• Substance identity must be established to a standard that allows the substance to be related to existing registrations. For complex algae-derived substances (UVCBs), substance identity characterisation is technically demanding and requires compositional data, source specification, and process description.
• Joint registration: REACH requires that manufacturers and importers of the same substance register jointly (one substance, one registration principle). If a substance is already registered by another entity, a new registrant typically joins the existing joint registration rather than registering independently.
• Data sharing: pre-existing data on substance safety must be shared between registrants, with cost allocation mechanisms. ECHA's substance information exchange forums (SIEFs) coordinate this.

For novel algae-derived compounds not yet in the ECHA database (REACH registration database / ECHA dissemination portal), a full new registration is required. Producers should check the ECHA information on chemicals database before assuming a registration is needed — the substance may already be registered under a broad UVCB definition that encompasses the algae-derived material.

REACH establishes a Candidate List of Substances of Very High Concern (SVHCs) — substances that are carcinogenic, mutagenic or toxic for reproduction (CMR), persistent/bioaccumulative/toxic (PBT), very persistent/very bioaccumulative (vPvB), endocrine disrupting, or of equivalent concern. The Candidate List is updated by ECHA regularly and currently contains several hundred substances.

Downstream users of SVHCs in articles must:

• Disclose the presence of any SVHC above 0.1% (w/w) in an article to their customers upon request and to consumers within 45 days of request.
• Provide sufficient information to allow safe use, including, at minimum, the name of the substance.

The Authorisation List (Annex XIV) is a subset of SVHCs for which a specific authorisation is required before a substance may be used or placed on the market for a defined use. Producers using any Annex XIV substance as a processing aid or chemical input must hold an authorisation or use it under an authorisation granted to their supplier.

Relevance to algae: most algae-derived substances are not SVHCs. However, downstream users of algae-derived compounds in cosmetics, textile processing, or industrial applications should check the current Candidate List, which is searchable on the ECHA website, for any processing chemicals or co-formulants they use.

REACH Annex XVII contains restrictions on the manufacture, placing on the market or use of certain hazardous substances. Restrictions apply to substances, mixtures and articles and are directly relevant to:

• Textiles: Annex XVII contains restrictions on azo dyes releasing carcinogenic aromatic amines, certain flame retardants, nonylphenol ethoxylates, and heavy metal-based pigments — all relevant when assessing the regulatory profile of algae-derived dyes and textile chemicals against conventional alternatives (see Textiles).
• PFAS: an EU-wide universal restriction on PFAS under REACH has been formally proposed by Denmark, Germany, the Netherlands, Norway and Sweden (ECHA restriction report published 2023). The restriction covers manufacture, use and placing on the market of all PFAS substances below certain thresholds and is under regulatory development. This is relevant to algae producers operating in environments with PFAS contamination and to producers exploring algae-derived alternatives to fluorinated water-repellent coatings in textiles and technical applications. See also Greenhouse Gases and Climate for the POP/PFAS bioaccumulation issue.
• Microplastics: Commission Regulation (EU) 2023/2055 introduced restrictions on intentionally added microplastics across multiple product categories, including some formulated products. Algae-derived microparticles (e.g. microalgae powder used in scrubs or coatings) that meet the technical definition of microplastics in the restriction must be assessed. Many natural microparticles are explicitly excluded, but the definition is technical and case-specific.

CLP (Regulation (EC) No 1272/2008) implements the United Nations Globally Harmonised System (GHS) in the EU and establishes uniform rules for classifying and labelling hazardous substances and mixtures. Its key provisions for algae producers:

• Self-classification: manufacturers and importers must classify substances and mixtures based on available data before placing them on the market, using the CLP classification criteria. Harmonised classifications (Annex VI of CLP, set by ECHA) take precedence over self-classification where they exist.
• Label requirements: classified substances and mixtures must carry CLP-compliant labels with hazard pictograms, signal words (Danger/Warning), hazard statements (H-phrases), and precautionary statements (P-phrases).
• Safety Data Sheets (SDS): under REACH Article 31, an SDS must be provided for all hazardous substances and mixtures, for substances meeting PBT/vPvB criteria, and for substances on the Candidate List. The SDS format is specified in Commission Regulation (EU) 2015/830 (see Key Legislation above). Most food-grade algal biomass and conventional algal food ingredients are not classified as hazardous and do not require an SDS — but algae-derived chemicals supplied to formulators (e.g. phycocyanin as an industrial dye, algal bio-solvents, concentrated algal extracts for cosmetic or industrial use) may require one, depending on their hazard classification.

Specific to algae: phycocyanin (blue-green pigment from cyanobacteria, particularly Arthrospira spp.) and other algal pigments are generally not classified as hazardous in commercial food-grade forms; however, high-purity concentrated forms or forms stabilised with hazardous solvents may require classification and SDS. Producers supplying algal pigments to industrial users (cosmetics, food processing, textiles) should verify classification with a toxicologist or regulatory affairs professional.

REACH places obligations not only on registrants (manufacturers and importers) but also on downstream users — any user further down the supply chain who uses a substance or mixture in their industrial or professional activities. For algae producers purchasing and using processing chemicals:

• Receive and check the SDS supplied by the chemical supplier. The SDS contains exposure scenarios and conditions of safe use that the downstream user must implement.
• Check conditions of use: the exposure scenarios in the SDS describe the conditions under which safe use is established. If the downstream user's use is not covered by the supplier's SDS exposure scenario, they must notify the supplier and, if the supplier does not add the use, prepare their own Chemical Safety Report.
• SVHC disclosure: downstream users receiving articles from their suppliers must communicate any SVHC presence to their own customers when requested.

REACH and CLP apply in addition to sector-specific legislation. REACH explicitly states that it does not replace sector-specific legislation but complements it:

• Food and feed law: a substance that is also a food additive, flavouring or processing aid is regulated primarily under food law, but REACH may still apply to its bulk manufacture and supply. The food-specific rules on safety assessment and authorisation take precedence for the food-use aspects, but REACH registration obligations apply to the substance manufacturer.
• Cosmetics: the Cosmetics Regulation (EC) No 1223/2009 governs the safety of cosmetic ingredients; REACH governs their chemistry and supply chain obligations. Both apply simultaneously. Cosmetics companies using novel algae extracts at commercial scale must address both frameworks.
• Biocidal products: some algae-derived compounds with antimicrobial properties may be classified as biocidal active substances under Regulation (EU) 528/2012 on biocidal products, which operates a separate authorisation system outside REACH.
• Fertilising products: algae-derived biostimulants under Regulation (EU) 2019/1009 are subject to the CMC requirements of that regulation; chemical substances within biostimulant formulations remain subject to REACH registration obligations if supplied as standalone substances.

• Identify all substances placed on the market: map every algae-derived compound you manufacture or import that is supplied as a distinct chemical entity (not embedded in a complex food or feed product sold retail). Assess each for REACH registration need.
• Check Annex V exemptions early: the natural substance exemption (Annex V, Entry 8) may exempt biomass and simple extracts from registration — but only where the substance is genuinely not chemically modified and is not classified as hazardous. Document the basis for relying on an exemption.
• Use the ECHA database before registering: search ECHA's substance registry for existing registrations. Well-known algae-derived substances (alginates, carrageenan, agar) will already have registered entries; contact the relevant SIEF rather than registering independently.
• SDS from suppliers: always request and retain SDS documents for all processing chemicals you purchase. Verify that your intended use is covered by the exposure scenarios in the SDS.
• Novel algae-derived chemicals: any novel compound with unique chemical structure — a synthetic derivative of an algal secondary metabolite, a chemically modified polysaccharide, an algal oil ester — requires a new REACH registration before commercial-scale manufacture or import. Start the ECHA substance inquiry process early: substance identity characterisation for UVCBs takes time.
• Monitor PFAS restriction progress: producers in environments where PFAS contamination is possible, or those developing algae-derived alternatives to fluorinated products, should monitor ECHA's PFAS restriction documentation for entry into force dates and scope.
• CLP compliance for industrial supplies: if your algae-derived product is sold as an industrial input (not as a food or feed), classify it under CLP, prepare a label and SDS if it is hazardous, and train staff handling it accordingly.

See also: Detergents and Household Products | Textiles | Cosmetics and Personal Care Products | Production, Processing and Hygiene | Greenhouse Gases and Climate | Equipment and Safety

Last reviewed: September 2026.