Namely
This aluminum salt is produced by reacting octenylsuccinic anhydride with starch. It is used in cosmetics as anti-caking agent, viscosity increasing agent (flow resistance) and absorbent. It is found in products such as lotions, makeup powders. For example, it may prevent the foundation from depositing on the skin or softening the oily shine associated with certain lotions. In dry shampoos, it supports the action of a starch, rice most of the time.
Although aluminum is considered to be neurotoxic, no study has demonstrated the toxicity of this salt in cosmetics. Note that it is not used in antiperspirants.