Pyridine–Pyrazolone TS
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This article is compiled based on the United States Pharmacopeia (USP) – 2025 Edition
Issued and maintained by the United States Pharmacopeial Convention (USP)
—To 100 mL of a saturated solution of 1-phenyl-3-methyl-2-pyrazoline-5-one add 20 mL of a 1 in 1000 solution of 3,3′-dimethyl-1,1′-diphenyl- [4,4′-bi-2-pyrazoline]-5,5′-dione in pyridine. Store in a dark bottle, and use within 3 days.
