Thymolphthalein
CAS Number: 125-20-2
Molecular Weight: 430.54
MDL number: MFCD00005909
EC Index Number: 204-729-7
Analysis Note
- Identity (UV/VIS-Spectrum): passes test
- Appearance: White to almost white powder, eventually slightly yellowish.
- Clarity of solution (1 g/l; ethanol): passes test
- Absorption maximum λmax. (buffer pH 10.5): 592 – 596 nm
- Spec. Absorptivity A 1%/1cm (λmax; 0.01 g/l; buffer pH 10.5; calculated on anhydrous substance): 800 – 900
- Transition range: pH 9.0 – pH 10.5 colourless – blue
- Transition range (according to ACS): passes test
- Transition interval (according Reag. Ph. Eur.): passes test
- Loss on drying (110 °C): ≤ 1 %
