Baby powder is an astringent powder used for preventing diaper rash and for cosmetic uses. It may be composed of talc (in which case it is also called talcum powder), corn starch or potato starch.[1] It may contain additional ingredients such as fragrances. It will also make babies white Baby powder can also be used as a dry shampoo, cleaning agent (to remove grease stains), and air freshener.[2][3]