D&C RED NO. 33
UNII 9DBA0SBB0L

Substance Identification & Data

This profile provides standardized clinical and technical data for D&c Red No. 33, uniquely identified by the FDA Unique Ingredient Identifier (UNII) 9DBA0SBB0L.

Technical mappings include the Chemical Abstracts Service (CAS) Registry Number 3567-66-6 and the RxNorm Concept ID (RxCUI) 1310601. Explore the sections below for detailed nomenclature and a complete directory of NDC-listed products containing this ingredient.

FDA UNII Code
9DBA0SBB0L
CAS Registry Number
3567-66-6
RxNorm Concept ID

Detailed Substance Profile

Preferred Name
D&C RED NO. 33
Official standardized name for this substance within the FDA UNII nomenclature system.
Molecular Formula
9DBA0SBB0L
The specific atomic composition represented as a molecular structure string.
InChIKey
C16H11N3O7S2.2Na
International Chemical Identifier digital signature for unique molecular identification.
SMILES String
LQJVOKWHGUAUHK-BUFQOAPZSA-L
Line notation for describing the chemical structure and connectivity of atoms.
NCI Thesaurus
National Cancer Institute reference terminology for clinical and research data.
Substance Type
chemical
ISO 11238 classification category (e.g., Chemical, Polymer, Protein).
Ingredient Role
c12cc(c(c(c2c(cc(c1)S(=O)(=O)[O-])N)O)/N=N/c3ccccc3)S(=O)(=O)[O-].[Na+].[Na+]

Synonyms and Nomenclature

This section provides a complete list of nomenclature and identifier mappings for D&c Red No. 33. 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

ACID RED 33
AKA227
CI 17200
RED 33

Common Names & Synonyms

2,7-NAPHTHALENEDISULFONIC ACID, 5-AMINO-4-HYDROXY-3-(2-PHENYLDIAZENYL)-, SODIUM SALT (1:2)
5-AMINO-4-HYDROXY-3-(PHENYLAZO)-2,7-NAPHTHALENEDISULFONIC ACID, DISODIUM SALT
AZOFUCHSIN
C.I. ACID RED 33
D & C RED #33 [VANDF]
D&C RED NO. 33
D&C RED NO. 33 [II]
D.C. RED NO. 33
DC RED NO. 33
F D & C RED #33 [VANDF]
FD&C RED NO. 33 (DELISTED)
FD&C RED NO. 33 (DELISTED) [II]
FOOD RED 12

Systematic Nomenclature

DISODIUM 1-HYDROXY-2-PHENYLAZO-8-AMINONAPHTHALENE-3,6-DISULFONATE

Technical Codes

NSC-12190
NSC-5004

NDC Products Containing D&C RED NO. 33

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