3-(1,3-Benzodioxol-5-yl)-2-methylpropanal

Helional (3-(1,3-Benzodioxol-5-yl)-2-methylpropanal) is a synthetic aromatic aldehyde widely used in fine fragrance and cosmetic formulations for its distinctive fresh, marine, and slightly floral-ozonic scent profile with subtle woody undertones. It is structurally related to heliotropin (piperonal) but features an additional methyl and aldehyde group that gives it a more complex, diffusive character reminiscent of sea air and fresh ozonic notes. Formulators prize Helional for its excellent tenacity, moderate substantivity on skin, and its ability to add transparency and lift to aquatic, fougère, and floral accords, making it a staple in modern perfumery.