Linalool

Linalool is a naturally occurring terpene alcohol found in over 200 plant species including lavender, mint, and coriander. It is one of the most widely used fragrance ingredients in consumer products and shows up frequently in car care products as a secondary fragrance note alongside citrus terpenes.

Like d-limonene, linalool undergoes oxidation upon air exposure, forming peroxide and epoxide derivatives that are stronger skin sensitizers than the parent compound. The European Commission Scientific Committee on Consumer Safety (SCCS) has confirmed the sensitization risk from oxidized linalool. At the low concentrations used in cleaning products (<1%), the acute hazard is minimal, but cumulative sensitization from repeated exposure in enclosed spaces warrants the EU fragrance allergen disclosure requirement.

At typical concentrations in fabric and upholstery cleaners (<0.25%), linalool is not classified at mixture level under GHS CLP. Its primary significance is as an EU fragrance allergen disclosure ingredient (EUH208 trigger when present ≥0.01% in leave-on products or ≥0.1% in rinse-off).