是7-羟基吩噁嗪酮，用过氧化氢进行氧化得到的N-氧化物。深红色有绿色光泽的棱柱形晶体。溶于碱得到蓝色溶液，溶于醇显示砖红色的荧光。用作酸碱指示剂，PH值3.8(橙色)～6.5(深紫色)。 一种氧化还原指示剂，在缺氧环境下由粉红变为无色。 食品研究中用作测试还原酶，检定次硫酸盐及检查牛奶中细菌时的还原指示剂。细胞繁殖与毒性定量检测等生物学染色试验。 Resazurin sodium salt is a blue dye used mainly as an oxidation-reduction indicator in the resazurin test for bacteria. Potentially useful to characterize metabolic activity of mitochnodria. A dye used as an oxidation-reduction indicator in the resazurin test for bacteria. As indicator pH 3.8 (orange) to 6.5 (dark violet)