Category
page 11871 introductions
yen
official currency of Japan
phenolphthaleina
Phenolphthalein ( ) is a chemical compound with the formula C20H14O4 and is often written as "HIn", "HPh", "phph" or simply "Ph" in shorthand notation. Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions. It belongs to the class of dyes known as phthalein dyes.
Lucky Strike
American cigarette brand
automatic block signaling
railroad communications system
animal cracker
cookie baked in the shape of an animal