Homosalate

A chemical sunscreen filter that absorbs UVB radiation. Homosalate is an organic ultraviolet (UV) filter that works by absorbing UVB radiation, primarily in the range of 290-320 nm. Upon absorption of UV photons, the molecule undergoes an excitation to a higher energy state. This absorbed energy is then safely dissipated as heat through a photostable process, typically involving internal conversion, preventing the harmful UV radiation from penetrating and damaging skin cells. This action effectively protects the skin from UVB-induced erythema and sunburn.

The Cosmetic Ingredient Review (CIR) Expert Panel has assessed Homosalate and reaffirmed its safety for use in cosmetics in current practices and concentrations. The U.S. FDA has approved Homosalate as an over-the-counter (OTC) sunscreen active ingredient. It is generally well-tolerated with a low potential for irritation or sensitization, though some studies have raised questions regarding potential systemic absorption and endocrine activity, warranting further research.

Look for products with Homosalate is typically used in cosmetic formulations as an active sunscreen ingredient at concentrations ranging from 1-15%. The U.S. FDA Monograph for sunscreen active ingredients permits its use up to 15%. for clinical efficacy.