( 1% solution
in Alcohol )
chemical formula: C20H14O4
( liquid )
Phenolphthalein is a sensitive PH indicator which remains colorless below a PH of 8.2, and turns
bright pink above a PH of 10. When mixed with Hydrogen Peroxide & Alcohol, Phenolphthalein can be used as a test for Blood.
Typically, very small amounts of Phenolphthalein
solution are used for indicating or in experiments (generally a few
drops). For this reason, a little of this material goes a long way. Because of its
drastic color changing ability, it also finds use in disappearing inks and similar novelties.
( Material Safety Data Sheet )