INCI Names & CAS Numbers4 min read
Lye on the Label: Sodium Hydroxide INCI for Soap Makers
Whether saponified soap should declare sodium hydroxide, the fatty acids, or the resulting sodium salts, explained for filing purposes.
July 3, 2026Read
Tagged lye
Suppliers & SDS4 min read
Reading the SDS for Lye Used in Soap Making
Sodium hydroxide's safety data sheet is dense but useful. Here is what a soap maker should actually pull from each section.
June 10, 2026Read
Prohibited & Restricted4 min read
Sodium Hydroxide and the Hotlist: What Soap Makers Ask
Lye disappears in a properly saponified bar, but that does not mean sodium hydroxide is irrelevant to your filing.
May 4, 2026Read
Soap & Handmade4 min read
Do You List Lye and Sodium Hydroxide on a Soap Label
Clears up the common confusion over whether sodium hydroxide belongs on a soap label once saponification has consumed it.
March 8, 2026Read
Soap & Handmade4 min read
Finding CAS Numbers for Common Soap Ingredients
A practical method for tracking down CAS numbers for oils, lye, and fragrance when a cosmetic notification form asks for them.
February 25, 2026Read
Ingredient Guides4 min read
Sodium Hydroxide (Lye): How to List It on Soap Notifications
Why finished cold process soap lists saponified oils instead of lye, plus the INCI name, CAS number, and handling notes makers ask about most.
January 27, 2026Read