English to Spanish Law/Patents Cosmetics, Beauty

Hola a todos estoy con una patente sobre una composición cosmética donde aparece "UV screening agent".
Ejemplos:

"They generally contain organic or inorganic UV-screening agents that operate, according to their intrinsic chemical nature and their intrinsic properties, by absorption, reflection or scattering of the UV radiation.."

"There is still a need for photoprotective cosmetic compositions with a good level of screening efficacy which is obtained using limited contents of UV-screening agents and..."

"..."hydrophilic organic UV-screening agent" means an organic molecule that is capable of screening out UV radiation between 290 and 400 nm, and which can be dissolved in molecular..."

Ya me aparece protection varias veces en el texto, para agent podría ser agente bloqueador/filtrante?
Alguien tiene una mejor idea?

Gracias a todos!