54339 甲基红钠盐 ACS reagent, 95 % 100g 630
54340 甲基红钠盐 ACS reagent, 95 % 25g 195
54341 甲基红钠盐 IND 500g 1066
54342 甲基红钠盐 IND 100g 383
54343 甲基红钠盐 IND 25g 116
橙红色结晶性粉末。溶于水和乙醇。*吸收波长437nm。
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)

酸碱指示剂，pH变色范围4.4(红)～6.2(黄)。氧化还原指示剂。用于硫酸铈滴定亚铁离子。