Do you use alumina in your formulas?
Alumina is used as the coating for the mineral sunscreen actives. It is rated 2 (green) by the EWG meaning it has a low hazard rating. The alumina acts as a protective coating to make the actives more photostable and provide a better skin feel. It's important to note, this has nothing to do with aluminum chlorohydrate, which is the aluminum ingredient used in deodorants.