THREONINE (L-threonine)
Official label name (INCI name, EU glossary of cosmetic ingredient names), No 28778
- No specific rule in the Cosmetics Regulation
THREONINE (L-threonine): no specific rule of the EU Cosmetics Regulation names it. It is neither prohibited nor restricted there, and it is on none of its lists of colorants, preservatives or UV filters.
In plain words
What it is used for
Functions declared by manufacturers:
Antistatic: reduces static electricity by neutralising electrical charge on a surface.
Hair conditioning: leaves the hair easy to comb, supple, soft and shiny and/or imparts volume, lightness, gloss, etc.
Hair waving or straightening: modifies the chemical structure of the hair, allowing it to be set in the style required.
What the rules say
No EU rule targets this ingredient specifically. It remains subject to the general rule: every product must undergo a safety assessment before it is sold (Article 10 of Regulation (EC) No 1223/2009), under the manufacturer's responsibility.
The text of the annexes
No specific rule of the EU Cosmetics Regulation names this ingredient: it is on none of its lists (prohibited, restricted, colorants, preservatives, UV filters). It may be used under the responsibility of the manufacturer, who must ensure the product is safe.
Identity
- CosIng identifier
- 38594
- CAS (according to CosIng)
- 72-19-5, 80-68-2
- EC (according to CosIng)
- 200-774-1, 201-300-6
- Declared functions
- Antistatic, Hair conditioning, Hair waving or straightening
- Wikidata
- Q186521
- ECHA InfoCard
- 100.000.704
CosIng cites 2 CAS numbers for this name: it covers several substances.
Elsewhere in the world
Information on other jurisdictions. What is covered, and what is not yet.
United Kingdom (Great Britain)
- No specific rule in the Cosmetics Regulation
Switzerland
Regulation (EC) No 1223/2009 applies in Switzerland (Article 54 of the Ordinance on Foodstuffs and Utility Articles).
United States, federal rules
None of the integrated sections of the federal code (21 CFR 700.11 to 700.27 and 250.250) targets this name. The FDA does not publish a list of allowed ingredients.
Recorded cosmetics that contain it
64 recorded products list it, according to Open Beauty Facts contributors. Records are dated: the formula may have changed. See the list (page in French).
Glossary: Commission Implementing Decision (EU) 2025/1175. Page updated on 21 October 2026.