5-PYRAZOLONE
UNII W43TJN4CTB

Substance Identification & Data

This profile provides standardized clinical and technical data for 5-pyrazolone, uniquely identified by the FDA Unique Ingredient Identifier (UNII) W43TJN4CTB.

Technical mappings include the Chemical Abstracts Service (CAS) Registry Number 137-44-0 and the RxNorm Concept ID (RxCUI) N/A. Explore the sections below for detailed nomenclature and a complete directory of NDC-listed products containing this ingredient.

FDA UNII Code

W43TJN4CTB

CAS Registry Number

137-44-0

RxNorm Concept ID

N/A

Detailed Substance Profile

Preferred Name

5-PYRAZOLONE

Official standardized name for this substance within the FDA UNII nomenclature system.

InChIKey

C3H4N2O

International Chemical Identifier digital signature for unique molecular identification.

SMILES String

ZRHUHDUEXWHZMA-UHFFFAOYSA-N

Line notation for describing the chemical structure and connectivity of atoms.

PubChem CID

316289

Unique identification number in the NCBI database of chemical substances.

Substance Type

chemical

ISO 11238 classification category (e.g., Chemical, Polymer, Protein).

Ingredient Role

C1C=NNC1=O

Synonyms and Nomenclature

This section provides a complete list of nomenclature and identifier mappings for 5-pyrazolone. Identifiers are organized into official regulatory terms, commercial trade names, and technical systematic synonyms used to ensure accurate identification across clinical pharmaceutical databases, regulatory filings, and electronic health records.