Ananda Saputra, Septian Maulid Wicahyo and Siwi Hastuti 2026. Identification Formula For Hydroquinone Compound Content In Bulk Body Lotion Cosmetic Preparations Sold On E-Commerce. International Journal of Health Engineering and Technology. 4, 6 (Mar. 2026). DOI:https://doi.org/10.55227/ijhet.v4i6.608.