Thymolphthalein   CAS No 125-20-2

Molecular formula: C28H30O4

Molecular weight: 430.54

Property :  White or yellowish crystalline powder. dissolved in ethanol or diluted basic hydroxide solution,undissolved in water, melting point : about 245-246C.

Use: acid-base indicator; chromatic spectrum analytic reagent.

Melting point : 251.0- 255.0

Range of PH: 9.0 (colorless) -10.2 (blue)

Solubility test in ethanol: passed

Solubility test in sodium hydroxide: passed

Residue on ignition (sulfate): 0.1% Max.