物化性质（Physical properties）: 本品为白色至微黄色粉末； 引湿性。 This product is a white to yellowish powder, hygroscopicity. 纯度（Purity）HPLC：≥98.0% 含量（Contents）dry basis：≥90.0% 贮藏（storage）：严封，凉暗干燥处保存。Preserve in tight, light-resistant containers, in a cool and dry place.
