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Technical Specification Chemical Name: 2,2’-(1,4-Phenylene)bis-4H-3,1-benzoxazin-4-one Appearance: White powder Active Content: ≥99% Melting Point: 314℃–317℃ Molecular Weight: 369 CAS No.: 18600-59-4 Description UV Absorber UV-3638 is a benzoxazinone UV absorber. It absorbs ultraviolet rays from 280–400 nm with an absorption peak at 349 nm. Its absorption range covers UVA and UVB, and its UV absorption efficiency is several times that of conventional UV absorbers. The
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