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.