Sodium lactate is the sodium salt of lactic acid, made by fermenting sugar into lactic acid and then neutralizing it with a sodium base. In general skincare it works as a plain humectant, part of the same natural moisturizing factor system as sodium PCA. In cold-process soap making specifically, it plays a completel...
How is it used?
In skincare, add it to the water phase. In cold-process soap, add it to the lye water once the lye has cooled down from its initial exotherm, before combining with the oils, not blended into the oils and not added after trace.
Forms
Available forms and grades affect how this ingredient behaves and how it should be selected for a formula.
Appearance
Color, texture, and physical characteristics can vary between suppliers and product grades.
Usage rate
Recommended incorporation levels depend on product type, supplier guidance, and the intended result.
Why we use it
Formulators choose this ingredient for specific performance, sensory, and stability benefits.
Strengths and limitations
Its advantages, compatibility considerations, and practical tradeoffs should be weighed during development.
Alternatives and substitutions
Possible replacements depend on the ingredient's role, desired skin feel, and formulation system.
Storage and shelf life
Appropriate storage conditions help protect quality and performance throughout the ingredient's usable life.
Create an account to read the full guide
Sign up free to unlock use levels, substitutions, formulation guidance, and storage advice.