What it is
Calcium chloride is a simple, highly water-soluble inorganic salt of calcium. In cosmetic formulas it is typically used at low levels, where its calcium ions can interact with thickening polymers and emulsifiers to adjust viscosity and help structure or stabilize gels and emulsions. It plays a functional, behind-the-scenes role rather than a skin-active one.
Safety & warnings
At the low concentrations used in cosmetics, calcium chloride is well tolerated and not comedogenic; concentrated solutions can be irritating, but finished products use minor amounts. It is not a fragrance allergen.
Origin & sourcing
Synthetic mineral salt; an inorganic compound of calcium and chlorine.
Questions everyone asks
Why is calcium chloride in a sunscreen?
It is usually present in small amounts to help control viscosity and stabilize the texture of the gel or emulsion.
Does calcium chloride affect the skin directly?
At the low levels used in cosmetics it acts mainly as a formulation aid rather than a skin-active ingredient.