Triisocetyl Citrate

Triisocetyl citrate is a citrate ester used mainly as an emollient/plasticizer to improve slip and reduce tack in cosmetics, typically at low-to-moderate percentages. Available safety and patch-test experience for citrate esters suggests low irritation and low sensitization potential, with reactions being uncommon but possible in highly reactive or compromised skin when combined with other irritants. Given its non-active, non-volatile profile but acknowledging rare individual intolerance, it best fits a very gentle score rather than inert. Safety Notes: Triisocetyl citrate is used as an emollient/skin-feel modifier and plasticizer-like ester in consumer cosmetics; in many leave-on creams/lotions and color cosmetics it appears at low levels (~0.1–2%) to improve slip, reduce tack, and aid pigment wetting/spread. In anhydrous leave-on formats (lip products, makeup primers, oil-based serums, sunscreens, and some hair styling/shine products), it can function as a primary emollient and reach ~10–30% in high-slip or high-pigment dispersion systems. It is uncommon in rinse-off at very high levels due to cost and the tendency to rely on cheaper esters/oils, but it can still appear at trace-to-low single-digit percentages for sensory tuning.