Heliotropin, also known as piperonal, is a chemical compound that is widely used in the fragrance industry as a fixative and as a scent in a range of products. Some synonyms for heliotropin include 3,4-methylenedioxybenzaldehyde, 1,3-benzodioxole-5-carboxaldehyde, and 3,4-methylendioxybenzolcarbaldehyd. It is also known by the brand name "Muguetex" in some parts of the world. While commonly used in perfumes, soaps, and other cosmetic products, heliotropin also has applications in the pharmaceutical industry, where it is used as a building block for the synthesis of other compounds. Despite its many uses, heliotropin can be a skin irritant and is considered toxic if ingested in large amounts.