Isoamyl Laurate

Isoamyl Laurate is a fatty acid ester emollient used to improve slip and reduce greasiness, typically present at a few percent up to ~10% in leave-on products. As a non-volatile, non-acidic, non-ionic lipid-like ingredient, it has a low rate of irritation in cosmetic patch testing and is generally well tolerated even in sensitive-skin formulas. Rare reactions can still occur in highly compromised eczema skin due to barrier disruption or co-ingredients, but the intrinsic irritancy of isoamyl laurate itself is very gentle. Safety Notes: Isoamyl Laurate is used as a lightweight emollient/sensory modifier and silicone alternative; in many commercial leave-on lotions, serums, and sunscreens it appears at low levels (~0.1–2%) to tune slip and reduce greasiness. Mid-range usage (3–15%) is common in creams, makeup, and hair conditioners as part of the emollient phase. High-strength consumer-available products such as dry oils, anhydrous balms, and some makeup/primer or sunscreen emollient bases can use it as a principal ester/emollient, reaching ~20–40% (with higher levels limited mainly by desired sensorial profile and viscosity rather than specific regulatory caps).