Linalyl Acetate

Linalyl acetate is a fragrance terpene ester (common in lavender/bergamot oils) used at low concentrations, but it is a well-recognized contact allergen and can provoke irritant and allergic contact dermatitis, especially in eczema-prone or barrier-impaired skin. Oxidation products can increase sensitization risk over time, and cumulative exposure from multiple fragranced products raises the likelihood of reaction. Given the disproportionate risk in sensitive-skin populations and the non-essential nature of fragrance, a significant irritancy score is warranted for patient safety. Safety Notes: Linalyl acetate is primarily used as a fragrance component, so at the low end it appears in lightly fragranced or “unscented” products only as a trace constituent of essential oils/fragrance (often ~0.0001–0.01%). In mainstream leave-on skincare and rinse-off cleansers it is commonly present via parfum or lavender/citrus oils around ~0.01–0.5%, while the highest consumer-available levels occur in strongly fragranced products (e.g., body sprays, fragranced body oils/lotions, and perfume-like skincare) where the ingredient can reach ~1–5% as part of a fragrance accord. Practical upper limits are generally driven by skin sensitization risk and IFRA category guidance (product-type dependent), with leave-on products typically formulated lower than rinse-off at comparable scent intensity.