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CHEBI:747411 - 4-amino-5-hydroxy-3,6-bis((E)-(4-((2-(sulfooxy)ethyl)sulfonyl)phenyl)diazenyl)naphthalene-2,7-disulfonic acid

Default Structure
ChEBI IDCHEBI:747411
ChEBI Name4-amino-5-hydroxy-3,6-bis((E)-(4-((2-(sulfooxy)ethyl)sulfonyl)phenyl)diazenyl)naphthalene-2,7-disulfonic acid
Stars
DefinitionReactive Black 5 is a synthetic, water-soluble bis-azo textile dye belonging to the class of reactive azo dyes. It contains two azo (–N=N–) linkages connecting substituted aromatic rings and is functionalized with reactive vinyl sulfone groups that enable covalent bonding with hydroxyl groups of cellulose fibers under alkaline conditions. Due to the presence of sulfonate groups, it exhibits high aqueous solubility. Reactive Black 5 is widely used in the dyeing of cotton and other cellulosic textiles and is recognized as an environmentally persistent organic pollutant due to its recalcitrance and potential to form aromatic amine degradation products under reductive conditions.
Last Modified2 March 2026
Submitter
DownloadsMolfile
FormulaC26H25N5O19S6
Net Charge0
Average Mass903.904
Monoisotopic Mass902.94680
SMILESNc1c(/N=N/c2ccc(S(=O)(=O)CCOS(=O)(=O)O)cc2)c(S(=O)(=O)O)cc2cc(S(=O)(=O)O)c(/N=N/c3ccc(S(=O)(=O)CCOS(=O)(=O)O)cc3)c(O)c12
InChIInChI=1S/C26H25N5O19S6/c27-23-22-15(13-20(53(37,38)39)24(23)30-28-16-1-5-18(6-2-16)51(33,34)11-9-49-55(43,44)45)14-21(54(40,41)42)25(26(22)32)31-29-17-3-7-19(8-4-17)52(35,36)12-10-50-56(46,47)48/h1-8,13-14,32H,9-12,27H2,(H,37,38,39)(H,40,41,42)(H,43,44,45)(H,46,47,48)/b30-28+,31-29+
InChIKeyOTKRGWXWWWNPKU-FUEWEDNTSA-N
ChEBI Ontology
Outgoing Relation(s)
4-amino-5-hydroxy-3,6-bis((E)-(4-((2-(sulfooxy)ethyl)sulfonyl)phenyl)diazenyl)naphthalene-2,7-disulfonic acid (CHEBI:747411) is a organic molecular entity (CHEBI:50860)
IUPAC Name 
4-amino-5-hydroxy-3,6-bis((E)-(4-((2-(sulfooxy)ethyl)sulfonyl)phenyl)diazenyl)naphthalene-2,7-disulfonic acid