中文別名: 甲基紅鈉 英文名稱: Methyl red sodium salt CAS號: 845-10-3 甲基紅鈉鹽
Methyl Red sodium salt
CAS號: 845-10-3
分子式: C15H14N3NaO2
分子量: 291.28
別名: 酸性紅2
橙紅色結(jié)晶性粉末。溶于水和乙醇。最大吸收波長437nm。
品級Grade 指示劑級(IND)
(indicator (pH 4.2-6.2)) 外觀Appearance 紅棕色粉末 紅外光譜鑒別Infrared spectrometry Conforms 水溶解試驗solubility in water clear(0.1% in water) pH變色域visual transition interval pH 4.2 (red) to pH 6.2 (yellow) 品級Grade ACS級 (ACS reagent, 95 %) 外觀Appearance 紅棕色粉末 紅外光譜鑒別Infrared spectrometry Conforms 染料含量Dye content, 95% 水溶解試驗solubility in water clear(0.1% in water) pH變色域visual transition interval pH 4.2 (red) to pH 6.2 (yellow) λ 430 - 440 nm c = 0.01 g/l; Water 消光系數(shù)Extinction Coefficient ≥17000 λ 256 - 260 nm 消光系數(shù)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變色域visual transition interval pH 4.2 (red) to pH 6.2 (yellow) 酸堿指示劑,pH變色范圍4.4(紅)~6.2(黃)。氧化還原指示劑。用于硫酸鈰滴定亞鐵離子。
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