CheckVegan

Is Sodium Hydroxide vegetarian?

Sodium Hydroxide

Vegetarian Vegetarian
Vegan 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 Potash, Caustic Soda, Lye, NaOH, natrii hydroxidum, POTASSIUM HYDROXIDE / SODIUM HYDROXIDE, Sodium lye
INCI name Sodium Hydroxide
E number E524
INS number 524
CAS number 1310-73-2
EC number 215-185-5
CosIng ID 37890
Last reviewed 16 April 2026

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

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