CHROMOTROPE 2B
UNII 81Y8BW5764

Substance Identification & Data

This profile provides standardized clinical and technical data for Chromotrope 2b, uniquely identified by the FDA Unique Ingredient Identifier (UNII) 81Y8BW5764.

Technical mappings include the Chemical Abstracts Service (CAS) Registry Number 548-80-1 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
81Y8BW5764
CAS Registry Number
548-80-1
RxNorm Concept ID
N/A

Detailed Substance Profile

Preferred Name
CHROMOTROPE 2B
Official standardized name for this substance within the FDA UNII nomenclature system.
InChIKey
C16H9N3O10S2.2Na
International Chemical Identifier digital signature for unique molecular identification.
SMILES String
AXUUHWJXDWBCSG-QIKYXUGXSA-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
c12c(O)c(/N=N/c3ccc([N+]([O-])=O)cc3)c(S(=O)(=O)[O-])cc1cc(S(=O)(=O)[O-])cc2O.[Na+].[Na+]

Synonyms and Nomenclature

This section provides a complete list of nomenclature and identifier mappings for Chromotrope 2b. 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

2,7-NAPHTHALENEDISULFONIC ACID, 4,5-DIHYDROXY-3-((4-NITROPHENYL)AZO)-, DISODIUM SALT
2,7-NAPHTHALENEDISULFONIC ACID, 4,5-DIHYDROXY-3-(2-(4-NITROPHENYL)DIAZENYL)-, SODIUM SALT (1:2)
2,7-NAPHTHALENEDISULFONIC ACID, 4,5-DIHYDROXY-3-(P-NITROPHENYLAZO)-, DISODIUM SALT
4,5-DIHYDROXY-3-(2-(4-NITROPHENYL)DIAZENYL)-2,7-NAPHTHALENEDISULFONIC ACID SODIUM SALT (1:2)
4,5-DIHYDROXYNAPHTHALENE-3-(4-NITROPHENYLAZO)-2,7-DISULFONIC ACID DISODIUM SALT
C.I. ACID RED 176, DISODIUM SALT
CHROMOTROPE 2B
CHROMOTROPE 2B [MI]
CHROMOTROPE RED 4B
NAPHTOCARD FAST RED 3B
P-NITROBENZENEAZOCHROMOTROPIC ACID SODIUM SALT
POLY-CHROMOTROPE 2B

Technical Codes

C.I. 16575
C.I. MORDANT BLACK 93
CR-2B
NSC-45542
PCR 2B