Picrolonic Acid
Title: Picrolonic Acid
CAS Registry Number: 550-74-3
CAS Name: 2,4-Dihydro-5-methyl-4-nitro-2-(4-nitrophenyl)-3H-pyrazol-3-one
Additional Names: 3-methyl-4-nitro-1-(p-nitrophenyl)-2-pyrazolin-5-one
Molecular Formula: C10H8N4O5
Molecular Weight: 264.19
Percent Composition: C 45.46%, H 3.05%, N 21.21%, O 30.28%
Properties: Yellow leaflets, mp 116-117°; dec at 125°. Sparingly sol in water; sol in alcohol.
Melting point: mp 116-117°
Use: As reagent for alkaloids, tryptophan, phenylalanine, and for the detection and estimation of calcium.

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