Bisabolol, primarily α-bisabolol, is a naturally occurring sesquiterpene alcohol widely recognized for its soothing, anti-inflammatory, and antimicrobial properties in cosmetic and therapeutic applications.

Chemical Structure and Properties

Bisabolol (C₁₅H₂₆O, MW 222.37) is characterized by a monocyclic sesquiterpene structure with a hydroxyl group at position 6 and a bisabolane skeleton containing gem-dimethyl and isopropenyl substituents. It appears as a viscous, colorless oil with low water solubility but high lipid compatibility, making it particularly suitable for topical formulations.

The naturally occurring (-)-α-bisabolol enantiomer is the most prevalent form and is responsible for its characteristic mild floral and chamomile-like aroma.

Natural Sources and Extraction

Bisabolol is primarily extracted from natural sources such as chamomile (Matricaria chamomilla), where it can represent 50–65% of the essential oil, and from the candeia tree (Vanillosmopsis erythropappa), which can yield up to 93% purity. Extraction is typically performed through steam distillation, followed by fractional vacuum distillation to achieve high-purity isolates.

In addition to natural extraction, synthetic bisabolol is also produced to ensure consistent supply and meet industrial demand.