What it is
Sodium Potassium Aluminum Silicate is an inorganic mineral compound of the aluminosilicate family. In formulations it functions as an inert bulking and texturizing agent that can add opacity, modify flow, and help control the feel of a product. It is used in sunscreens and color cosmetics as a structural or aesthetic ingredient rather than as a UV filter.
Safety & warnings
As an inert, insoluble mineral silicate it is generally well tolerated and non-irritating in topical products. Inhalation of loose powders should be avoided during manufacture or with powder formats, a general precaution that applies to fine particulate mineral ingredients.
Origin & sourcing
Mineral-derived inorganic aluminosilicate; grades may be obtained from natural mineral sources such as nepheline syenite or produced synthetically.
Questions everyone asks
Is this a sunscreen filter?
No. It is an inert mineral aluminosilicate used for bulking, opacity, and texture, not for absorbing or reflecting UV light as a rated filter.
Is the aluminum in it a concern on skin?
The aluminum is bound within an insoluble silicate mineral, not present as a free reactive form, and is used as an inert structural ingredient in topical products.