Is 1H-Indole-5,6-diol restricted in EU cosmetics?

1H-Indole-5,6-diol is restricted in EU cosmetics under Annex III.

Is 1H-Indole-5,6-diol restricted under the ASEAN Cosmetic Directive?

1H-Indole-5,6-diol is restricted under the ASEAN Cosmetic Directive Annex III with a maximum concentration of (b) 0.5%.

The CAS number for 1H-Indole-5,6-diol is 3131-52-0.

Regulatory data is for reference only. Always verify with the official regulator before making formulation decisions. Last refreshed: 8/29/2026.

Ingredients/1H-Indole-5,6-diol

EU CosIng III — restrictedASEAN III — restricted

Source	Status	Annex / Details	Limit / Conditions	Last updated
EU CosIng	restricted	Annex III		—
ASEAN	restricted	Annex III	(b) 0.5%	—

1H-Indole-5,6-diol has regulatory signals in EU CosIng, ASEAN. Review the source links above for the official conditions and latest updates.

Is 1H-Indole-5,6-diol restricted in EU cosmetics?: 1H-Indole-5,6-diol is restricted in EU cosmetics under Annex III.
Is 1H-Indole-5,6-diol restricted under the ASEAN Cosmetic Directive?: 1H-Indole-5,6-diol is restricted under the ASEAN Cosmetic Directive Annex III with a maximum concentration of (b) 0.5%.
What is the CAS number for 1H-Indole-5,6-diol?: The CAS number for 1H-Indole-5,6-diol is 3131-52-0.