A synthetic disazo dye, regulated in Annex IV.
What it is
CI 20470, also known as Acid Black 1, is a water-soluble sodium naphthalenedisulphonate dye that CosIng classes chemically as a disazo colour. CosIng lists it as a colorant. In the EU it is listed in Annex IV (colorants).
Where it is used
Appears on the ingredient lists of a small number of coloured products.
Limits of interpretation
The INCI list shows which ingredients are present, not how much of each. Above 1%, ingredients are listed in descending order of weight; below 1% the order is free.
See the EU regulation section for the applicable conditions. The INCI list does not show how much colour it contributes.
Functions
- Colorant
- Exclusively or mainly intended to colour the cosmetic product, the body as a whole or certain parts thereof, by absorption or reflection of visible light; (precursors of oxidative hair colorants shall be deemed colorants). All authorised colorants are substances in the positive list of Annex IV to the Cosmetics Regulation 1223/2009.
EU regulation
- Maximum concentration
- Rinse-off products
- As of
- 3 November 2026 · (EC) 2009/1223
Safety Gate alerts (EU)
2 alerts about dangerous cosmetics in the EU mention this substance. An alert concerns a specific product, usually one that breaks EU rules.
- Lictin Temporary Tattoos Kit (2023-02-16)
- Henna temporäre tattoos von pretop (2023-02-09)