The advantages of Sunobel® PA can be summarized as: High absorption effect on UVA, Excellent light stability and compatibility, Enhance the SPF value of UVB sunscreen. Sunobel® PA dissolves in alcohols and oils, and it defilades of UV range covered the whole UVA, from 320 to 400  nm wavelength, the maximum absorption peak is at 354 nm. For the shielding, Sunobel® PA has the same effect  as the current best sunscreen Avobenzone. Comparing to other UV filters, Sunobel® PA perform excellent in light  stability and compatibility. The benzophenone derivative DHHB is extremely photostable and, unlike other UV  filters, Sunobel® PA does not form toxic or allergic photodegradation products. Sunobel® PA can be compatible  with other sunscreens and formulated with common excipients to form stable preparations for topical applications, therefore, it has broad application prospects in sunscreen and anti-aging products. When used with UVB  sunscreen, it can improve the SPF value of the product and contribute to UVB protection.