FERRIC OXIDE YELLOW
UNII EX438O2MRT

Substance Identification & Data

This profile provides standardized clinical and technical data for Ferric Oxide Yellow, uniquely identified by the FDA Unique Ingredient Identifier (UNII) EX438O2MRT.

Technical mappings include the Chemical Abstracts Service (CAS) Registry Number 51274-00-1 and the RxNorm Concept ID (RxCUI) 1305582. Explore the sections below for detailed nomenclature and a complete directory of NDC-listed products containing this ingredient.

FDA UNII Code
EX438O2MRT
CAS Registry Number
51274-00-1
RxNorm Concept ID

Detailed Substance Profile

Preferred Name
FERRIC OXIDE YELLOW
Official standardized name for this substance within the FDA UNII nomenclature system.
Molecular Formula
EX438O2MRT
The specific atomic composition represented as a molecular structure string.
InChIKey
Fe.O.HO.H2O
International Chemical Identifier digital signature for unique molecular identification.
SMILES String
LDHBWEYLDHLIBQ-UHFFFAOYSA-M
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.
Substance Type
chemical
ISO 11238 classification category (e.g., Chemical, Polymer, Protein).
Ingredient Role
[OH-].[O-2].[Fe+3].O

Synonyms and Nomenclature

This section provides a complete list of nomenclature and identifier mappings for Ferric Oxide Yellow. 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

CI 77492

Common Names & Synonyms

C.I. 77492
C.I. PIGMENT YELLOW 42
CI PIGMENT YELLOW 42 AND 43
CI(1975) NO. 77492
E-172(III)
FERRIC OXIDE (HYDRATE) [NF]
FERRIC OXIDE HYDRATE
FERRIC OXIDE YELLOW
FERRIC OXIDE YELLOW [II]
FERRIC OXIDE, HYDRATED
FERRIC OXIDE, HYDRATED [II]
FERRIC OXIDE, YELLOW
FERRIC OXIDE,YELLOW
FERRIC OXIDE,YELLOW [VANDF]
FERRIC OXYHYDROXIDE HYDRATE
HYDRATED FERRIC OXIDE
HYDRATED FERRIC-OXIDE
HYDRATED IRON (III) OXIDE
HYDROUS FERRIC OXIDE
INS NO.172(III)
INS-172(III)
IRON OXIDE YELLOW
IRON OXIDE,YELLOW
IRON OXIDE,YELLOW [VANDF]
IRON(III) OXIDE-HYDROXIDE MONOHYDRATE
LIMONITE
MAPICO YELLOW
NATURAL YELLOW IRON OXIDE
PIGMENT YELLOW 42
SYNTHETIC YELLOW IRON OXIDE
YELLOW FERRIC OXIDE
YELLOW IRON OXIDE
YELLOW OCHRE
YELLOW OCHRE [II]
YELLOW OCHRE [VANDF]

Brand / Trade Names

FERROX

NDC Products Containing FERRIC OXIDE YELLOW

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