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Essentially Natural

Essentially Natural Caustic Soda Lye (Sodium Hydroxide)

Essentially Natural Caustic Soda Lye (Sodium Hydroxide)

Regular price R 69.00
Regular price Sale price R 69.00
Liquid error (snippets/price line 153): divided by 0 Sold out

8 in stock

Caustic Soda, or lye, is an alkali used in soap making. It is also known as sodium hydroxide and has the chemical formula of NaOH. Lye reacts with the fats in oils to produce an opaque or cloudy, hard soap. It is all consumed in the chemical reaction and none remains once soap is produced.

Size: 500g, 1kg or 5L (4kg).

Why we love lye: it is used to make soap! Find all our beautiful soap recipes and soap making inspiration here: Soaps

This product is certified: Vegan and Beauty Without Cruelty.

INCI: Sodium hydroxide

Sodium Hydroxide

98.5% minimum purity.

SDS available for download here

COA available for download here

Note: A Certificate of Analysis (COA) is a document sharing the outcomes of a scientific test. It helps us verify that a product meets the specified standards. These tests are conducted on product batches, so slight variations in results between different batches are normal. If the batch number on this COA doesn't match the one on the product you bought from us, please get in touch with us. This is just one recent instance. Feel free to reach out if you have any questions or concerns.

  • Always wear protective clothing when working with caustic soda
  • Avoid skin or eye contact
  • Avoid inhalation or ingestion
  • Can cause severe burns
  • If skin or eyes are contacted flush with water for 15 minutes
  • NB - This is not a food grade product and is not suitable for making food stuff.
  • This natural product is for external use only. Please exercise caution and do not ingest or take internally. Store away from children, animals, sunlight and heat. If pregnant or breastfeeding, please consult with your medical care-giver before use.
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Customer Reviews

Based on 37 reviews
Lauren L.W.
Works amazing

Works well on my soa

Nicola R.

High quality product. Safely packaged and delivered on time. Would highly recommend Essentially Natural.

Tanna D.

Great product, excellent service and love that there are recipes on the website. Had a very successful experience making soap with my learners at school

Kerry B.
Soap maker in the making

Came so promptly and packed with such care. Of course I made soap almost immediately and although it hasn’t even had time to cure properly yet I think it turned out great!

Susan B.
Caustic Soda

Great product-I use for soap making