← Home

Is Sodium Hydroxide vegan?

Sodium Hydroxide

Vegan

Sodium hydroxide, commonly known as caustic soda or lye, is a strongly alkaline inorganic compound produced industrially by the electrolysis of sodium chloride solution (chloralkali process). It is used in cosmetics as a pH adjuster and to saponify fats and oils.

Also known as Caustic Soda, Lye, NaOH, Sodium lye
E number E524
CAS number 1310-73-2
EC number 215-185-5
Last reviewed 16 April 2026

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.