4-Aminophenazone

Aminopyrazolone; 4-aminoantipyrine; 4-amino-2,3-dimethyl-1-phenyl-5-pyrazolone; C₁₁H₁₃N₃O = 203.3 (83-07-8)

General reagent grade of commerce.

Light yellow needles or powder; melting point, about 108°.