Is 1H-Indole-2,3-Dione restricted in EU cosmetics?

1H-Indole-2,3-Dione is restricted in EU cosmetics under Annex III with a maximum concentration of 1.6%.

Is 1H-Indole-2,3-Dione restricted under the ASEAN Cosmetic Directive?

1H-Indole-2,3-Dione is restricted under the ASEAN Cosmetic Directive Annex III with a maximum concentration of 1.6%.

The CAS number for 1H-Indole-2,3-Dione is 91-56-5.

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

Ingredients/1H-Indole-2,3-Dione

EU CosIng III — restrictedASEAN III — restricted

Source	Status	Annex / Details	Limit / Conditions	Last updated
EU CosIng	restricted	Annex III	1.6%	—
ASEAN	restricted	Annex III	1.6%	—

1H-Indole-2,3-Dione has regulatory signals in EU CosIng, ASEAN. Review the source links above for the official conditions and latest updates.

Is 1H-Indole-2,3-Dione restricted in EU cosmetics?: 1H-Indole-2,3-Dione is restricted in EU cosmetics under Annex III with a maximum concentration of 1.6%.
Is 1H-Indole-2,3-Dione restricted under the ASEAN Cosmetic Directive?: 1H-Indole-2,3-Dione is restricted under the ASEAN Cosmetic Directive Annex III with a maximum concentration of 1.6%.
What is the CAS number for 1H-Indole-2,3-Dione?: The CAS number for 1H-Indole-2,3-Dione is 91-56-5.