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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 135465071Generated: October 23, 2026

Sodium 3-hydroxy-4-((1-hydroxy-2-naphthyl)azo)naphthalene-1-sulphonate

https://huagongshe.com/en/chemical/135465071

Sodium 3-hydroxy-4-((1-hydroxy-2-naphthyl)azo)naphthalene-1-sulphonate molecular structure

Identifiers & Physical Properties

CAS No.3564-14-5
Molecular formulaC20H13N2NaO5S
Average molar mass416.4 g/mol
Monoisotopic mass416.0442868 g/mol
SMILESO=S(=O)([O-])c1cc(O)c(N=Nc2ccc3ccccc3c2O)c2ccccc12.[Na+]
InChIKeyHOWITLLZNKSJOJ-UHFFFAOYSA-M
PubChem CID135465071
ChEMBLCHEMBL471028
EC No.222-639-6
DTXSIDDTXSID0063074

Chemical & Physical Properties

Topological polar surface area131
Hydrogen bond donors2
Hydrogen bond acceptors7
Rotatable bonds3
Heavy atoms29
Formal charge0
Complexity685

Safety & Regulations

GHS classificationWarningH319 (100%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]P264+P265, P280, P305+P351+P338, and P337+P317 (click each P-code to see the statement)Aggregated GHS information provided per 42 reports by companies from 3 notifications to the ECHA C&L Inventory.
Regulatory informationEriochrome blue-black B: Does not have an individual approval but may be used under an appropriate group standard
Hazard Classes and CategoriesEye Irrit. 2 (100%)