SPF Scout · Ingredient
3-Aminopropane Sulfonic Acid
CAS 3687-18-1
What this ingredient generally does
This works as a cleansing agent and a hydrotrope. It helps lift away dirt and oil, and it helps keep hard-to-mix ingredients dissolved and evenly spread through the formula.
Reviewed before publication. This note describes function in a formulation — 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.
BCM Cosmetique SAS No7 Restore and Renew Multi Action Day Cream Sunscreen Broad Spectrum SPF 25
SPF 25 as labeled · U.S. formulation
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.