===== Detergents and Household Products =====

Detergents are governed by a separate EU regulation from cosmetics and food-contact materials. While currently a minor application area for algae, algae-derived surfactants and biopolymers are of growing interest as sustainable alternatives to petrochemical-derived ingredients. This chapter covers the EU detergents framework and its relevance to algae-derived substances.

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==== The Detergents Regulation ====

Regulation (EC) No 648/2004 of the European Parliament and of the Council of 31 March 2004 on detergents, OJ L 104, 8.4.2004, p. 1, [[https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A02004R0648-20150601|EURlex]].

__Relevance to algae:__ This Regulation governs the placing on the market of detergents and surfactants within the EU. "Detergent" is broadly defined to include laundry detergents, dishwasher detergents, hard-surface cleaning products, and other surface-active products. Key provisions:

  * __Biodegradability__: all surfactants used in detergents must be ultimately biodegradable (pass the ultimate biodegradability test in Annex III). Algae-derived surfactants (glycolipids, biosurfactants from microalgae and associated bacteria) are naturally biodegradable and can readily meet this criterion, which is a commercial advantage over many synthetic alternatives.
  * __Labelling__: detergents must be labelled with a list of ingredients (by category), a dosage recommendation, and precautionary statements. Ingredients derived from algae are typically listed by their INCI name or a descriptive name consistent with the ingredient list format specified in the Regulation.
  * __Safety data sheets__ (SDS) must accompany professional-use products; ingredient safety information for algae-derived surfactants must be included.
  * __Phosphate restrictions__: Annex VIa to the Regulation limits phosphates in laundry and dishwasher detergents. This is relevant for algae only indirectly — it is one of the reasons for growing interest in bio-based and algae-derived alternatives to phosphate-containing builders.

A revision of the Detergents Regulation is ongoing (as of 2025), aimed at extending the biodegradability framework and integrating new substances (including microplastics, endocrine disruptors, and bioaccumulative substances). Algae-derived ingredients are generally well-positioned under this revised framework.

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==== Algae-derived Surfactants and Their Regulatory Status ====

Several types of algae-derived surfactant-relevant compounds are under commercial development:

  * __Glycolipids__ (e.g. mannosylerythritol lipids from microorganisms associated with algae cultivation, or sophorolipids from yeasts grown on algal substrates) — natural biosurfactants with good biodegradability profiles.
  * __Polysaccharides as viscosity modifiers__ — carrageenan and alginates from red and brown seaweeds are used in cosmetic and personal care formulations; their use in detergent formulations as thickeners or stabilisers is also possible.
  * __Agar and algal hydrocolloids__ — some detergent formulations use agar-based gelling agents.
  * __Algal-derived biopolymers__ — research interest in algal polyhydroxyalkanoates (PHAs) and other biopolymers as alternatives to synthetic polymer-based detergent additives.

Novel algae-derived surfactant compounds not previously used in detergents may need to be assessed against REACH registration requirements (see below) before commercial use.

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==== REACH Interface ====

Regulation (EC) No 1907/2006 on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH) [[https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A02006R1907-20260511|EURlex]] applies to chemical substances placed on the EU market, including surfactants and other functional chemicals derived from algae. Key points:

  * Substances produced at or imported above one tonne per year must be registered with ECHA; existing REACH registrations for established surfactants may cover algae-derived equivalents if they are the same chemical substance.
  * Novel algae-derived substances with unique chemical structures (not already registered) require new REACH registrations.
  * Natural substances derived from plants, animals or microorganisms that are used without modification may benefit from certain REACH exemptions, but the scope of these exemptions must be assessed case-by-case.

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==== Practical Implications for Producers ====

  * __Biodegradability__ is the primary regulatory advantage of algae-derived surfactants over synthetic alternatives — demonstrate compliance with the Regulation's biodegradability test requirements to substantiate commercial claims.
  * __Labelling__ of detergents containing algae-derived ingredients should follow the Regulation's ingredient list format; ensure algae-derived ingredients are correctly identified by their technical function and standard name.
  * __REACH assessment__ is necessary for novel algae-derived surfactant molecules before commercial scale-up; engage ECHA pre-registration consultation where relevant.
  * __Monitor the Detergents Regulation revision__ for new requirements on microplastics, biodegradability of all ingredients (not just surfactants), and restrictions on other hazardous substance categories.

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//See also: [[algae:cosmetics|Cosmetics and Personal Care Products]] | [[algae:fertiliser_products|Fertiliser Product Regulation]] | [[algae:greenwashing_claims|Green Claims and Greenwashing]]//

//Last reviewed: June 2026.//