ISATIN
Official label name (INCI name, EU glossary of cosmetic ingredient names), No 13637
- Allowed with restrictions (Annex III)
ISATIN: Allowed with restrictions, maximum 1.6% in the ready-for-use preparation, only in: Hair dye substance in non-oxidative hair dye products (Annex III, entry 210), under Regulation (EC) No 1223/2009.
In plain words
What it is used for
Functions declared by manufacturers:
Hair dyeing: colours hair.
What the rules say
Allowed, with restrictions: Annex III sets a maximum concentration, the product types allowed and a warning to be printed on the packaging. Ingredient lists do not give quantities, so the concentration cannot be checked on the label; the warning can.
The text of the annexes
Allowed with restrictions
- Entry
- Annex III, No 210
- Substance
- 1H-Indole-2,3-Dione
- Glossary names
- ISATIN
- CAS
- 91-56-5
- EC
- 202-077-8
- Product type
- Hair dye substance in non-oxidative hair dye products
- Maximum concentration
- 1.6%
- Warnings
- Hair colorants can cause severe allergic reactions. Read and follow instructions. This product is not intended for use on persons under the age of 16. Temporary ‘black henna’ tattoos may increase your risk of allergy. Do not colour your hair if: — you have a rash on your face or sensitive, irritated and damaged scalp, — you have ever experienced any reaction after colouring your hair, — you have experienced a reaction to a temporary ‘black henna’ tattoo in the past.’
Dates in the act (4)
- Application from 11 July 2013
etic products (1), and in particular Article 31(1) thereof, Whereas: (1) Regulation (EC) No 1223/2009 replacing Council Directive 76/768/EEC of 27 July 1976 on the approximation of the laws of the Member States relating to cosmetic products (2) will apply from 11 July 2013.
- Entry into force on 31 July 2013
- Application from 1 September 2013
It shall apply from 1 September 2013.
- Entry into force on 1 September 2013
Excerpts from the English text published in the Official Journal. A date may concern only some substances of the act: the excerpt says so.
Identity
- CosIng identifier
- 56779
- CAS (according to CosIng)
- 91-56-5
- EC (according to CosIng)
- 202-077-8
- Declared functions
- Hair dyeing
- Wikidata
- Q421348
- PubChem
- 7054
- ECHA InfoCard
- 100.001.889
- InChIKey
- JXDYKVIHCLTXOP-UHFFFAOYSA-N
Elsewhere in the world
Information on other jurisdictions. What is covered, and what is not yet.
United Kingdom (Great Britain)
- Allowed with restrictions (Annex III)
Same entries as in the European Union. Conditions (concentrations, warnings) may differ: they are not compared here.
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.
Glossary: Commission Implementing Decision (EU) 2025/1175. Page updated on 21 October 2026.