SPF Scout · Ingredient

Sodium Lactate

Buffering (holds the formula at a set acidity)Humectant (holds moisture)Keratolytic (CosIng functional class)

CAS 72-17-3

What this ingredient generally does

Sodium Lactate is a salt that helps balance the product's acidity (buffering) and acts as a humectant, drawing in and holding moisture. It also has a keratolytic action, meaning it helps loosen and shed surface skin cells. On labels it's the sodium salt of lactic acid.

Reviewed before publication. This note describes function in a formulation, and nothing else.

Published formulations that list this ingredient

These are the formulations currently published in the SPF Scout catalog whose stored ingredient declaration includes this ingredient. It is not a list of every product on the market, and the order carries no meaning.

Checking this against your own list

You can select this ingredient in the SPF Scout app as one to flag. The app compares your selections against a product's stored declaration on your device; your list never reaches this website.

This comparison does not predict whether your skin will react.

Where this information comes from

Ingredient names, CAS numbers and recorded functions come from SPF Scout’s curated ingredient dictionary, grounded in CosIng, the European Commission’s Cosmetic Ingredient Database. Content © European Union, reused with acknowledgement.

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