CheckVegan

Is Isatin vegetarian?

Isatin

Vegetarian Vegetarian
Vegan Vegan

Isatin is an organic indole derivative first obtained from the oxidation of indigo dye; it is used in cosmetic and pharmaceutical formulations, produced synthetically.

Also known as 1H-Indole-2,3-Dione, Tribulin
INCI name Isatin
CAS number 91-56-5
EC number 202-077-8
CosIng ID 56779
Last reviewed 9 July 2026

An ingredient is considered vegetarian if it avoids components derived from killing an animal.

Classifications are made to the best of our knowledge based on available scientific and regulatory sources. We cannot guarantee the accuracy of every entry, errors in the sources we draw from can always occur. This tool also cannot account for cross-contamination, which depends entirely on individual suppliers and producers. If you believe a classification is incorrect, you can report an issue.

Report an issue