橙黄色或黄棕色粉末。易溶于水,微溶于乙醇,不溶于苯和氯仿。1%水溶液pH为2.15,其水溶液呈浅黄褐色,加盐酸后变成黄色,加氢氧化钠后则变成蓝紫色。有刺激性
品级Grade 分析纯
(AR)
外观Appearance Yellow-green to orange-brown powder
红外光谱Infrared spectrometry Conforms to Structure
纯度Purity(HPLC) ≥80.0%
Lambda max 554 to 558 nm
590 to 599 nm
Absorpt. Ratio P-15/P+15 0.97 to 1.07 (for the first maximum)
项目Item 指示剂
(Ind)
灵敏度(对酸和碱)Sensitiveness to acids and alkalies 合格
pH变色域Visual transition interval(yellow-violet) 3.7(黄)~5.2(紫)
水溶解试验Solubility in water 合格
对铝的灵敏度Sensitiveness to aluminum 合格