HISTIDINE
UNII 4QD397987E

Substance Identification & Data

This profile provides standardized clinical and technical data for Histidine, uniquely identified by the FDA Unique Ingredient Identifier (UNII) 4QD397987E.

Technical mappings include the Chemical Abstracts Service (CAS) Registry Number 71-00-1 and the RxNorm Concept ID (RxCUI) 5340. Explore the sections below for detailed nomenclature and a complete directory of NDC-listed products containing this ingredient.

FDA UNII Code
4QD397987E
CAS Registry Number
71-00-1
RxNorm Concept ID

Detailed Substance Profile

Preferred Name
HISTIDINE
Official standardized name for this substance within the FDA UNII nomenclature system.
Molecular Formula
4QD397987E
The specific atomic composition represented as a molecular structure string.
InChIKey
C6H9N3O2
International Chemical Identifier digital signature for unique molecular identification.
SMILES String
HNDVDQJCIGZPNO-YFKPBYRVSA-N
Line notation for describing the chemical structure and connectivity of atoms.
NCI Thesaurus
National Cancer Institute reference terminology for clinical and research data.
PubChem CID
Unique identification number in the NCBI database of chemical substances.
INN ID
6163
Sequential identifier assigned via the WHO International Nonproprietary Name program.
Substance Type
chemical
ISO 11238 classification category (e.g., Chemical, Polymer, Protein).
Ingredient Role
C(c1c[nH]cn1)[C@@H](C(=O)O)N

Synonyms and Nomenclature

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

FDA Official Name

HISTIDINE

Common Names & Synonyms

HISTIDINE [EP MONOGRAPH]
HISTIDINE [HSDB]
HISTIDINE [II]
HISTIDINE [INN]
HISTIDINE [MART.]
HISTIDINE [MI]
HISTIDINE [USAN]
HISTIDINE [USP MONOGRAPH]
HISTIDINE [VANDF]
HISTIDINE [WHO-DD]
L-HISTIDINE [FCC]
L-HISTIDINE [FHFI]
L-HISTIDINE [JAN]
L-HISTIDINE [USP-RS]
SERINE IMPURITY C [EP IMPURITY]

Systematic Nomenclature

(2S)-2-AMINO-3-(IMIDAZOL-4-YL)PROPANOIC ACID
HISTIDINE, L-
L-HISTIDINE

Technical Codes

FEMA NO. 3694
NSC-137773

NDC Products Containing HISTIDINE

This unique ingredient identifier is listed as an ingredient or substance in the following products in the NDC directory: