Phenolphthalein
CAS No. 77-09-8
Molecular Weight: 318.33
Visual transition interval (PH)8.0(Colorless)-10.0(Reddish purple)

Phenolphthalein 

CAS No. 77-09-8

Molecular Formula: C20H14O4

Molecular Weight: 318.33

Visual transition interval (PH): 8.0(Colorless)-10.0(Reddish purple)

Mass absorption coefficient : 68.0---75.0(L/cm·g)

Solubility in Ethanol: Pass

Loss on drying: 1.0 % max

Residue on ignition (sulfate): 0.05%max