Benzophenone-3 utilizes an excited state intramolecular proton transfer from a hydroxyl group to dissipate light energy. It was supposed to dissipate the absorbed light energy in a harmless manner, indeed benzophenone-3 converts the absorbed photon energy into heat without chemical damage (Schnabel and Kiwi, 1978). Benzophenone-3 has strong absorption in 280–340 nm (UV-B) range.