4-(4-CHLOROBENZYL)PHTHALAZIN-1(2H)-ONE
UNII 56DW142LLX

Substance Identification & Data

This profile provides standardized clinical and technical data for 4-(4-chlorobenzyl)phthalazin-1(2h)-one, uniquely identified by the FDA Unique Ingredient Identifier (UNII) 56DW142LLX.

Technical mappings include the Chemical Abstracts Service (CAS) Registry Number 53242-88-9 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
56DW142LLX
CAS Registry Number
53242-88-9
RxNorm Concept ID
N/A

Detailed Substance Profile

Preferred Name
4-(4-CHLOROBENZYL)PHTHALAZIN-1(2H)-ONE
Official standardized name for this substance within the FDA UNII nomenclature system.
InChIKey
C15H11ClN2O
International Chemical Identifier digital signature for unique molecular identification.
SMILES String
NLXGCQIEVZYDRS-UHFFFAOYSA-N
Line notation for describing the chemical structure and connectivity of atoms.
PubChem CID
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([nH]nc(c2ccccc12)Cc3ccc(cc3)Cl)=O

Synonyms and Nomenclature

This section provides a complete list of nomenclature and identifier mappings for 4-(4-chlorobenzyl)phthalazin-1(2h)-one. 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.

Common Names & Synonyms

1(2H)-PHTHALAZINONE, 4-P-CHLOROBENZYL-
AZELASTINE HYDROCHLORIDE IMPURITY D [EP IMPURITY]
AZELASTINE RELATED COMPOUND D
AZELASTINE RELATED COMPOUND D [USP IMPURITY]
AZELASTINE RELATED COMPOUND D [USP-RS]

Systematic Nomenclature

1(2H)-PHTHALAZINONE, 4-((4-CHLOROPHENYL)METHYL)-
4-((4-CHLOROPHENYL)METHYL)-1(2H)-PHTHALAZINONE
4-(4-CHLOROBENZYL)-1(2H)-PHTHALAZINONE
4-(4-CHLOROBENZYL)PHTHALAZIN-1(2H)-ONE