It works to filter out both UVA and UVB rays, protecting the skin from sun UV damage. The UV-filter substance, sulisobenzone (BP-4) is widely used an ingredient in sunscreens and other personal care products. It falls under the drug category of benzophenones. The benzophenones are a group of aromatic ketones that have both pharmaceutical and industrial applications . Benzophenones may be found organically in fruits such as grapes . Benzophenones are used as photoinitiators, fragrance enhancers, ultraviolet curing agents, and, occasionally, as flavor ingredients; they are also used in the manufacture of insecticides, agricultural chemicals, and pharmaceuticals and as an additive for plastics, coatings, and adhesives. As a group, benzophenones may be used to delay photodegradation or extend shelf life in toiletries and plastic surface coatings.