UV Filter, Sunscreen Agent

Homosalate

Homosalate is an oil-soluble chemical (organic) sunscreen agent that absorbs UVB radiation, with peak protection at 306 nm. It is valued in sunscreen formulations primarily as a solvent for dissolving other difficult-to-solubilise powder UV filters such as avobenzone. However, it is a relatively weak standalone filter (SPF ~4.3 at maximum concentration) and is not photostable, losing approximately 10% of its SPF protection within 45 minutes of UV exposure.