BMHCA, also known as 2-(4-tert-butylbenzyl) propionaldehyde or commonly as Lilial, is a synthetic fragrance used in cosmetics and personal care products like lotions, deodorants, hair products, perfumes, and more. It has a floral scent reminiscent of lily of the valley.
https://www.productip.com/kb/productipedia/compliance-resources/ban-on-bmhca-in-cosmetic-products
