- Aromatherapy — Your Complete Essential Oils Guide
- The Science of Aromatherapy
- Chemical Composition of Essential Oils
Chemical Composition of Essential Oils
The chemical composition of essential oils determines their therapeutic properties, safety profile, and aromatic character. Essential oils are complex mixtures of 20-200+ different chemical compounds.
Major Chemical Groups
Terpenes (Monoterpenes and Sesquiterpenes)
The largest group. Examples: limonene, alpha-pinene, beta-caryophyllene. Properties: antimicrobial, anti-inflammatory, analgesic.
Alcohols (Monoterpenols)
Examples: linalool, geraniol, menthol. Properties: antimicrobial, gentle, skin-safe.
Esters
Examples: linalyl acetate, geranyl acetate. Properties: calming, antispasmodic, balancing.
Aldehydes
Examples: citral, cinnamaldehyde. Properties: antimicrobial, stimulating, potentially irritating.
Phenols
Examples: thymol, carvacrol, eugenol. Properties: powerful antimicrobial, potentially irritating.
Ketones
Examples: camphor, menthone, thujone. Properties: mucolytic, potentially neurotoxic at high doses.
Oxides
Examples: 1,8-cineole (eucalyptol). Properties: expectorant, decongestant, stimulating.