項(xiàng)目ltem 酸堿指示劑 |
(acid-base indicator) |
pH變色域Visual transition 6.0(黃)~7.6(藍(lán)) |
質(zhì)量吸收系數(shù)Mass absorptivity,L/cm·g ≥52.0 |
乙醇溶解試驗(yàn)Solubility(in ethanol) 合格 |
灼燒殘?jiān)?以硫酸鹽計(jì))Ignition residue,% ≤0.3 |
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項(xiàng)目 ACS級(jí),95 % |
(ACS, Dye content 95 %) |
外觀Appearance 粉棕色至紫色結(jié)晶粉末 |
紅外光譜鑒別Infrared spectrometry 和對(duì)照品匹配 |
染料含量Dye content(HPLC) ≥95% |
澄清度Claroty of solution 合格 |
變色范圍Visual transition interval pH 6.0(Yellow-Green)-pH 6.7(Green)-pH 7.6 (Blue) |
Wavelength 419- 425 nm |
c = 0.02g/L; Methanol |
Extinction Coefficient 17,000 |
Wavelength 326- 332 nm |
Extinction Coefficient 8,000 |
Wavelength 279- 285 nm |
Extinction Coefficient 9,000
酸堿指示劑,吸附指示劑,色譜分析用。
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