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· · COA & SDS available for every product · Same-day shipping on in-stock items Hydroxynaphthol blue - indicator for metal titration , CAS No.63451-35-4
GRADE & PURITY indicator for metal titration
Synonyms
MFCD00036393 | VG5SKF7S6C | DTXSID8069852 | 1,1'-Azonaphthalene, 2,2'-dihydroxy-3,3',6-trisulfonic acid-, trisodium salt | 2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-((2-hydroxy-4-sulfo-1-naphthalenyl)azo)-, trisodium salt | EINECS 264-197-7 | Trisodium
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Why this grade indicator for metal titration 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 11 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
Specifications Synonyms
MFCD00036393 | VG5SKF7S6C | DTXSID8069852 | 1,1'-Azonaphthalene, 2,2'-dihydroxy-3,3',6-trisulfonic acid-, trisodium salt | 2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-((2-hydroxy-4-sulfo-1-naphthalenyl)azo)-, trisodium salt | EINECS 264-197-7 | Trisodium
Specifications & Purity
indicator for metal titration
Names and Identifiers Pubchem Sid Url
https://pubchem.ncbi.nlm.nih.gov/substance/488187496
Canonical Smiles
C1=CC=C2C(=C1)C(=CC(=C2N=NC3=C4C=CC(=CC4=CC(=C3O)S(=O)(=O)[O-])S(=O)(=O)[O-])O)S(=O)(=O)[O-].[Na+].[Na+].[Na+]
IUPAC Name
trisodium;3-hydroxy-4-[(2-hydroxy-4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-2,7-disulfonate
InChIKey
AUIINJJXRXMPGT-UHFFFAOYSA-K
INCHI
1S/C20H14N2O11S3.3Na/c23-15-9-16(35(28,29)30)13-3-1-2-4-14(13)18(15)21-22-19-12-6-5-11(34(25,26)27)7-10(12)8-17(20(19)24)36(31,32)33;;;/h1-9,23-24H,(H,25,26,27)(H,28,29,30)(H,31,32,33);;;/q;3*+1/p-3
Isomeric SMILES
C1=CC=C2C(=C1)C(=CC(=C2N=NC3=C4C=CC(=CC4=CC(=C3O)S(=O)(=O)[O-])S(=O)(=O)[O-])O)S(=O)(=O)[O-].[Na+].[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 Benzenoids Class Naphthalenes Subclass 1,1'-azonaphthalenes Intermediate Tree Nodes Not available Direct Parent 1,1'-azonaphthalenes Alternative Parents 2-naphthalene sulfonic acids and derivatives 2-naphthalene sulfonates 1-naphthalene sulfonic acids and derivatives 1-naphthalene sulfonates 1-sulfo,2-unsubstituted aromatic compounds 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 homopolycyclic compounds Substituents 1,1'-azonaphthalene - Naphthalene sulfonate - 1-naphthalene sulfonic acid or derivatives - 2-naphthalene sulfonic acid or derivatives - Naphthalene sulfonic acid or derivatives - 1-naphthalene sulfonate - 2-naphthalene sulfonate - Arylsulfonic acid or derivatives - 1-sulfo,2-unsubstituted aromatic compound - Phenoxide - Organic sulfonic acid or derivatives - Organosulfonic acid or derivatives - Organosulfonic acid - Sulfonyl - Azo compound - Organic alkali metal salt - Organic 1,3-dipolar compound - Propargyl-type 1,3-dipolar organic compound - Organic sodium salt - Hydrocarbon derivative - Organic oxide - Organonitrogen compound - Organic nitrogen compound - Organic oxygen compound - Organosulfur compound - Organooxygen compound - Organic salt - Organic cation - Aromatic homopolycyclic compound Description This compound belongs to the class of organic compounds known as 1,1'-azonaphthalenes. These are organonitrogen aromatic compounds that contain a central azo group, where each nitrogen atom is conjugated to the 1-position of a naphthalene ring system. Naphthalene is a compound made up of two fused 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 Solubility Water solubility: Approximately 340 g/L (20℃) Molecular Weight 620.500 g/mol XLogP3 Hydrogen Bond Donor Count 2 Hydrogen Bond Acceptor Count 13 Rotatable Bond Count 2 Exact Mass 619.922 Da Monoisotopic Mass 619.922 Da Topological Polar Surface Area 262.000 Ų Heavy Atom Count 39 Formal Charge 0 Complexity 1120.000 Isotope Atom Count 0 Defined Atom Stereocenter Count 0 Undefined Atom Stereocenter Count 0 Defined Bond Stereocenter Count 0 Undefined Bond Stereocenter Count 0 The total count of all stereochemical bonds 0 Covalently-Bonded Unit Count 4
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