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Phenolphthalein
IUPAC name 3,3-bis(4-hydroxyphenyl)isobenzofuran-1(3H)-one
Properties
Molecular formula	C20H14O4
Molar mass	318.32 g mol−1
Density	1.277 g cm−3, at 32 °C
Melting point	260 °C
Boiling point	N/A
Solubility in water	Insoluble
Solubility in other solvents	Insoluble in benzene, very soluble in ethanol and ether, slightly soluble in DMSO