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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 17501Generated: November 3, 2026

4-(2-(4-Hydroxyphenyl)diazenyl)benzenesulfonic acid

4-Hydroxy-4'-sulfoazobenzene · 4-[(4-Sulfophenyl)diazenyl]phenol · 4'-hydroxyazobenzene-4-sulphonic acid · 4-(4-Hydroxyphenylazo)benzenesulfonic acid · 4-[(4-Hydroxyphenyl)diazenyl]benzenesulfonic Acid · Benzenesulfonic acid, 4-[2-(4-hydroxyphenyl)diazenyl]-

https://huagongshe.com/en/chemical/17501

4-(2-(4-Hydroxyphenyl)diazenyl)benzenesulfonic acid molecular structure

Identifiers & Physical Properties

CAS No.2918-83-4
Molecular formulaC12H10N2O4S
Average molar mass278.29 g/mol
Monoisotopic mass278.03612798 g/mol
SMILESO=S(=O)(O)c1ccc(N=Nc2ccc(O)cc2)cc1
InChIKeyCNYMBHPFLJWLJW-UHFFFAOYSA-N
PubChem CID17501
EC No.220-856-0
DTXSIDDTXSID501222303

Chemical & Physical Properties

XLogP2.1
Topological polar surface area108
Hydrogen bond donors2
Hydrogen bond acceptors6
Rotatable bonds3
Heavy atoms19
Formal charge0
Complexity402
Melting point270-275 °C
Density1.44±0.1 g/cm3(Predicted)
pKa (acidity coefficient)-1.03±0.50(Predicted)