PHENOLPHTHALEIN DISODIUM SALT

Chemical Properties

Melting point	>250°C
storage temp.	Amber Vial, Refrigerator, Under inert atmosphere
solubility	Solubility Soluble in water, ethanol
form	Powder
pka	9.1(at 25℃)
color	Dark purple to dark brown
PH Range	Colorless (8.0) to pink (10.0)
λmax	553nm
Stability	Hygroscopic, Light Sensitive
Major Application	Inks, fire-resistant polymers, permanent hair straightener
EPA Substance Registry System	1(3H)-Isobenzofuranone, 3,3-bis(4-hydroxyphenyl)-, disodium salt (518-51-4)