Alcohol C-11 UndecylenicAlcohol C 11 undecylenic greets you with a bright, clean freshnesswaxy rose petals with a citrus zing and a hint of cool ozone. This is one of the defining materials for that dewy, just washed, sparkling quality you recognise from classic floral perfumes. The fatty undertone is milder than the aldehyde and rounds the freshness rather than dragging it down. This material gives florals an instant lift. It brightens rose compositions with waxy petal