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
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)
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