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· · COA & SDS available for every product · Same-day shipping on in-stock items Brilliant Yellow - Dye content ≥50 % , CAS No.3051-11-4
GRADE & PURITY Dye content ≥50 %
Synonyms
Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis(5-(2-(4-hydroxyphenyl)diazenyl)-, sodium salt (1:2) | Direct Yellow 4 | Paper Yellow 3GX | Paper Yellow CB | B0783 | Benzo Brilliant Yellow | 4,4'-Bis[(4-hydroxyphenyl)azo]stilbene-2,2'-disulfonic acid,sodium
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Why this grade Dye content ≥50 % for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
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Storage & shipping Room temperature Ships Normal Check lot-specific COA for exact specifications.
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Quality documents SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.
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Literature proof Cited in 10 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
Specifications Synonyms
Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis(5-(2-(4-hydroxyphenyl)diazenyl)-, sodium salt (1:2) | Direct Yellow 4 | Paper Yellow 3GX | Paper Yellow CB | B0783 | Benzo Brilliant Yellow | 4,4'-Bis[(4-hydroxyphenyl)azo]stilbene-2,2'-disulfonic acid,sodium
Specifications & Purity
Dye content ≥50 %
Names and Identifiers Canonical Smiles
C1=CC(=CC=C1N=NC2=CC(=C(C=C2)C=CC3=C(C=C(C=C3)N=NC4=CC=C(C=C4)O)S(=O)(=O)[O-])S(=O)(=O)[O-])O.[Na+].[Na+]
IUPAC Name
disodium;5-[(4-hydroxyphenyl)diazenyl]-2-[(E)-2-[4-[(4-hydroxyphenyl)diazenyl]-2-sulfonatophenyl]ethenyl]benzenesulfonate
InChIKey
YLDIUICHQPKMNH-ZFEDVODKSA-L
INCHI
1S/C26H20N4O8S2.2Na/c31-23-11-7-19(8-12-23)27-29-21-5-3-17(25(15-21)39(33,34)35)1-2-18-4-6-22(16-26(18)40(36,37)38)30-28-20-9-13-24(32)14-10-20;;/h1-16,31-32H,(H,33,34,35)(H,36,37,38);;/q;2*+1/p-2/b2-1+,29-27?,30-28?;;
Isomeric SMILES
C1=CC(=CC=C1N=NC2=CC(=C(C=C2)/C=C/C3=C(C=C(C=C3)N=NC4=CC=C(C=C4)O)S(=O)(=O)[O-])S(=O)(=O)[O-])O.[Na+].[Na+]
Documentation 📋 Safety Data Sheet (SDS) Comprehensive hazard, handling, storage, and regulatory compliance document.
Download SDS → ✅ Certificate of Analysis (COA) Lot-specific quality data. Enter your lot number to retrieve the exact COA.
Look up COA → 📊 Datasheet Quick-reference summary of product specifications and applications.
View datasheet → 🔬 Specification Sheet Full quality attributes and acceptance criteria for this grade.
View spec sheet →
Advanced Data Taxonomic Classification Kingdom Organic compounds Superclass Phenylpropanoids and polyketides Class Stilbenes Subclass Sulfonated stilbenes Intermediate Tree Nodes Not available Direct Parent Sulfonated stilbenes Alternative Parents Azobenzenes Benzenesulfonic acids and derivatives Benzenesulfonyl compounds 1-sulfo,2-unsubstituted aromatic compounds Styrenes Phenoxides Sulfonyls Organosulfonic acids Azo compounds Propargyl-type 1,3-dipolar organic compounds Organooxygen compounds Organic sodium salts Organic oxides Hydrocarbon derivatives Organic cations Molecular Framework Aromatic homomonocyclic compounds Substituents Sulfonated stilbene - Azobenzene - Benzenesulfonate - Arylsulfonic acid or derivatives - Benzenesulfonyl group - 1-sulfo,2-unsubstituted aromatic compound - Styrene - Phenoxide - Monocyclic benzene moiety - Benzenoid - Organic sulfonic acid or derivatives - Organosulfonic acid or derivatives - Organosulfonic acid - Sulfonyl - Azo compound - Organic 1,3-dipolar compound - Propargyl-type 1,3-dipolar organic compound - Organic alkali metal salt - Organic nitrogen compound - Organic oxygen compound - Organosulfur compound - Organooxygen compound - Organonitrogen compound - Organic sodium salt - Organic salt - Hydrocarbon derivative - Organic oxide - Organic cation - Aromatic homomonocyclic compound Description This compound belongs to the class of organic compounds known as sulfonated stilbenes. These are stilbenes that carry a sulfone group at one or more positions of either benzene rings. External Descriptors Not available Data sources 1. Djoumbou Feunang Y, Eisner R, Knox C, Chepelev L, Hastings J, Owen G, Fahy E, Steinbeck C, Subramanian S, Bolton E, Greiner R, and Wishart DS. ClassyFire: Automated Chemical Classification With A Comprehensive, Computable Taxonomy. Journal of Cheminformatics, 2016, 8:61.
3D Structure Certificates（CoA,COO,BSE/TSE and Analysis Chart) Chemical and Physical Properties Molecular Weight 624.600 g/mol XLogP3 Hydrogen Bond Donor Count 2 Hydrogen Bond Acceptor Count 12 Rotatable Bond Count 6 Exact Mass 624.036 Da Monoisotopic Mass 624.036 Da Topological Polar Surface Area 221.000 Ų Heavy Atom Count 42 Formal Charge 0 Complexity 1000.000 Isotope Atom Count 0 Defined Atom Stereocenter Count 0 Undefined Atom Stereocenter Count 0 Defined Bond Stereocenter Count 1 Undefined Bond Stereocenter Count 0 The total count of all stereochemical bonds 1 Covalently-Bonded Unit Count 3
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