SPF Scout · Ingredient
Aminoethanesulfinic Acid
CAS 300-84-5
What this ingredient generally does
An ingredient added to protect the formula. It works as an antioxidant and a reducing agent, both of which help keep the product from breaking down through reactions with oxygen.
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.
Shiseido SHISEIDO URBAN ENVIRONMENT MINERAL CLEAR SUNSCREEN
U.S. formulation
Shiseido SHISEIDO URBAN ENVIRONMENT VITA-CLEAR SUNSCREEN
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.