CAS No: 77-09-8
Chemical Name: 3,3-bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone
Molecular Formula: C20H14O4
Molecular Weight: 318.323
Chemical Structure:

Phenolphthalein has been used for over a century as a laxative, but is now being removed from the market because of concerns over carcinogenicity. However, the small amounts usually used in experiments are harmless.
Phenolphthalein is used in analysis as an acid and alkali indicator because its solution is brilliant red in alkalies and is decolorized by acids.

Standard: BP 98 / USP24
Packing: 25kgs/drum
Storage: Keep container tightly closed.
Keep container away from light, heat in a cool, well-ventilated area.