质量标准: 品级Grade 指示剂级(IND)
(indicator (pH 4.2-6.2))
外观Appearance 红棕色粉末
红外光谱鉴别Infrared spectrometry Conforms
水溶解试验solubility in water clear(0.1% in water)
pH变色域visual transition interval pH 4.2 (red) to pH 6.2 (yellow)
品级Grade ACS级
(ACS reagent, 95 %)
外观Appearance 红棕色粉末
红外光谱鉴别Infrared spectrometry Conforms
染料含量Dye content, 95%
水溶解试验solubility in water clear(0.1% in water)
pH变色域visual transition interval pH 4.2 (red) to pH 6.2 (yellow)
λ 430 - 440 nm
c = 0.01 g/l; Water
消光系数Extinction Coefficient ≥17000
λ 256 - 260 nm
消光系数Extinction Coefficient ≥8000
Visual Transition Interval pH 4.2 Pink
Visual Transition Interval pH 5.5 Orange
Visual Transition Interval pH 6.2 Yellow
pH变色域visual transition interval pH 4.2 (red) to pH 6.2 (yellow)