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ethyl 4-hydroxy-2-phenylpyrimidine-5-carboxylate; CAS No.: 55613-22-4; ChemShuttle specializes in hydroxylated arylpyrimidines like ethyl 4-hydroxy-2-phenylpyrimidine-5-carboxylate for sunscreen development. The phenolic OH group enables UV absorption while ester enhances skin penetration. With molar extinction coefficient =12,000 at 310nm, it serves as effective UV filter. Technical documents include photostability testing data.