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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 76216Generated: October 31, 2026

Benzenesulfonic acid, 3-[2-(2,4-dihydroxyphenyl)diazenyl]-4-hydroxy-

2',4',6-Trihydroxyazobenzene-3-sulfonic acid · 3-(2,4-dihydroxyphenylazo)-4-hydroxybenzenesulphonic acid · 4-Hydroxy-3-[(2,4-dihydroxyphenyl)azo]benzenesulfonic acid · Benzenesulfonic acid, 3-[2-(2,4-dihydroxyphenyl)diazenyl]-4-hydroxy-

https://huagongshe.com/en/chemical/76216

Benzenesulfonic acid, 3-[2-(2,4-dihydroxyphenyl)diazenyl]-4-hydroxy- molecular structure

Identifiers & Physical Properties

CAS No.2918-80-1
Molecular formulaC12H10N2O6S
Average molar mass310.28 g/mol
Monoisotopic mass310.02595722 g/mol
SMILESO=S(=O)(O)c1ccc(O)c(N=Nc2ccc(O)cc2O)c1
InChIKeyNOYGQBBPVKLDQU-UHFFFAOYSA-N
PubChem CID76216
EC No.220-855-5
DTXSIDDTXSID0062711

Chemical & Physical Properties

XLogP1.4
Topological polar surface area148
Hydrogen bond donors4
Hydrogen bond acceptors8
Rotatable bonds3
Heavy atoms21
Formal charge0
Complexity477
Density1.65±0.1 g/cm3(Predicted)
pKa (acidity coefficient)-0.57±0.50(Predicted)
EPA Substance Registry SystemBenzenesulfonic acid, 3-[(2,4-dihydroxyphenyl)azo]-4-hydroxy- (2918-80-1)
TSCA inventory statusTSCA listed

Safety & Regulations

TSCA inventory statusTSCA listed