PROBLEM TO BE SOLVED: To provide an ultraviolet light absorber and photostabilizer which has excellent ultraviolet light absorptivity in an ultraviolet light wavelength region, without absorbing a visible light, and also having high stability and safety.SOLUTION: A pyrazine compound expressed by formula (I) and/or its salts is provided. Also, an ultraviolet light absorber is characterized by comprising the pyrazine compound and/or its salts.COPYRIGHT: (C)2009,JPO&INPIT【課題】紫外線波長領域において優れた紫外線吸収能を有する一方で、可視光を吸収せず、しかも安定性及び安全性の高い紫外線吸収剤及び光安定化剤を提供する。【解決手段】下記式(I)で表されるピラジン化合物及び/またはその塩。【選択図】なし
