CheckVegan

Is HC Brown No. 1 vegan?

HC Brown No. 1

Vegan Vegan
Vegetarian Vegetarian

HC Brown No. 1 is a synthetic azo dye used as a colorant in semi-permanent hair dye formulations. It is manufactured through chemical synthesis.

Also known as 3-[[4-[[diamino(phenylazo)phenyl]azo]-1-naphthyl]azo]-N,N,N-trimethylanilinium chloride
INCI name HC Brown No. 1
CAS number 83803-98-9
EC number 280-919-3
CosIng ID 34198
Last reviewed 9 July 2026

An ingredient is considered vegan if it contains no animal-derived components at any point in its production.

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