2-hydroxy-4-methoxy-5-sulfonylbenzophenone(BP-4)

2-Hydroxy-4-methoxy-5-sulfonylbenzophenone, commonly referred to as BP-4, is an organic compound that belongs to the family of benzophenones. It is primarily used as a UV filter in cosmetic products like sunscreens to absorb ultraviolet rays from the sun. Additionally, it can also be found in plastics and other materials requiring UV stability. Its sulfonyl, methoxy, and hydroxy functional groups contribute to its effectiveness as a UV absorber.