DIRECT RED 81
UNII 7E49Q56PNB

Substance Identification & Data

This profile provides standardized clinical and technical data for Direct Red 81, uniquely identified by the FDA Unique Ingredient Identifier (UNII) 7E49Q56PNB.

Technical mappings include the Chemical Abstracts Service (CAS) Registry Number 2610-11-9 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
7E49Q56PNB
CAS Registry Number
2610-11-9
RxNorm Concept ID
N/A

Detailed Substance Profile

Preferred Name
DIRECT RED 81
Official standardized name for this substance within the FDA UNII nomenclature system.
Molecular Formula
7E49Q56PNB
The specific atomic composition represented as a molecular structure string.
InChIKey
C29H19N5O8S2.2Na
International Chemical Identifier digital signature for unique molecular identification.
SMILES String
UFUQRRYHIHJMPB-DUCFOALUSA-L
Line notation for describing the chemical structure and connectivity of atoms.
Substance Type
chemical
ISO 11238 classification category (e.g., Chemical, Polymer, Protein).
Ingredient Role
[O-]S(=O)(=O)c1ccc(cc1)/N=N/c2ccc(cc2)/N=N/c3c(S([O-])(=O)=O)cc4cc(ccc4c3O)NC(=O)c5ccccc5.[Na+].[Na+]

Synonyms and Nomenclature

This section provides a complete list of nomenclature and identifier mappings for Direct Red 81. 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

DIRECT RED 81

Common Names & Synonyms

2-NAPHTHALENESULFONIC ACID, 7-(BENZOYLAMINO)-4-HYDROXY-3-((4-((4-SULFOPHENYL)AZO)PHENYL)AZO)-, DISODIUM SALT
2-NAPHTHALENESULFONIC ACID, 7-(BENZOYLAMINO)-4-HYDROXY-3-(2-(4-(2-(4-SULFOPHENYL)DIAZENYL)PHENYL)DIAZENYL)-, SODIUM SALT (1:2)
7-(BENZOYLAMINO)-4-HYDROXY-3-((4-((4-SULFOPHENYL)AZO)PHENYL)AZO)-2-NAPHTHALENESULFONIC ACID, DISODIUM SALT
C.I. DIRECT RED 81 DISODIUM SALT

Brand / Trade Names

AIREDALE RED KD
C.I. DIRECT RED 81
CHLORANTINE FAST RED 5B
SIRIUS SUPRA RED 4B
TRIANTINE LIGHT RED 4BN

Technical Codes

NSC-326198

NDC Products Containing DIRECT RED 81

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