PYRROLIDONE
UNII KKL5D39EOL

Substance Identification & Data

This profile provides standardized clinical and technical data for Pyrrolidone, uniquely identified by the FDA Unique Ingredient Identifier (UNII) KKL5D39EOL.

Technical mappings include the Chemical Abstracts Service (CAS) Registry Number 616-45-5 and the RxNorm Concept ID (RxCUI) 1358473. Explore the sections below for detailed nomenclature and a complete directory of NDC-listed products containing this ingredient.

FDA UNII Code

KKL5D39EOL

CAS Registry Number

616-45-5

RxNorm Concept ID

1358473

Detailed Substance Profile

Preferred Name

PYRROLIDONE

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

Molecular Formula

KKL5D39EOL

The specific atomic composition represented as a molecular structure string.

InChIKey

C4H7NO

International Chemical Identifier digital signature for unique molecular identification.

SMILES String

HNJBEVLQSNELDL-UHFFFAOYSA-N

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

PubChem CID

12025

Unique identification number in the NCBI database of chemical substances.

Substance Type

chemical

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

Ingredient Role

C1(NCCC1)=O

Synonyms and Nomenclature

This section provides a complete list of nomenclature and identifier mappings for Pyrrolidone. 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.