Sodium Hydroxide (NaOH), also known as Lye and Caustic Soda. When sodium hydroxide mixed with a liquid, a lye solution is created, which is a strong alkali. Lye forms a great soap base for the production of natural cold process bar soap. Our lye comes in a safe container fitted with a resealable cap.

A basic soap recipe just needs a few essential ingredients: Water, vegetable fat, essential oils for fragrance, and lye. However, you may want to consider an additional list of ingredients such as coconut oil and shea butter that are beneficial to the skin. Lye solution, when mixed with fats and oils, will cause a chemical reaction called saponification. The result of saponification is beautiful natural handmade soap.

This alkali makes a solid bar soap, not liquid soap. We recommend the use of a online Lye Calculator to ensure you have a balanced and moisturising recipe. Try the online Soapmaking Friend calculator, you'll find it very helpful (https://www.soapmakingfriend.com/soap-making-recipe-builder-lye-calculator).

Due to its dangerous goods classification, we only ship Sodium Hydroxide within Hong Kong.

Always add the lye to the water, and NOT the water to the lye. An unpleasant, violent reaction occurs if you do.