CheckVegan

Is Trimethylamine Oxide vegan?

Trimethylamine Oxide

Vegan Vegan
Vegetarian Vegetarian

Trimethylamine oxide (TMAO) is an organic compound with the formula (CH3)3NO, typically encountered as its dihydrate. It is a synthetic or naturally occurring amine oxide used in cosmetic formulations.

Also known as Methanamine, N,N-Dimethyl-, N-Oxide, Dihydrate
INCI name Trimethylamine Oxide
CAS number 1184-78-7
EC number 214-675-6
CosIng ID 59857
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