CheckVegan

Is Dihydroxyindoline HBr vegetarian?

Dihydroxyindoline HBr

Vegetarian Vegetarian
Vegan Vegan

Dihydroxyindoline HBr is the hydrobromide salt of a synthetic indoline derivative used as an intermediate in oxidative hair dye formulations.

Also known as 2,3-Dihydro-1H-Indole-5,6-Diol Hydrobromide
INCI name Dihydroxyindoline HBr
CAS number 138937-28-7
EC number 421-170-6
CosIng ID 55797
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