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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 178958574Generated: October 23, 2026

H acid

Einecs 308-561-6 · 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, coupled with diazotized 3,3'-dimethoxy(1,1'-biphenyl)-4,4-diamine and 5,5'-(oxybis((5-hydroxy-3,1-phenylene)oxy))bis(1,3-benzenediol), sodium salts · 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, coupled with diazotized 3,3'-dimethoxy[1,1'-biphenyl]-4,4-diamine and 5,5'-[oxybis[(5-hydroxy-3,1-phenylene)oxy]]bis[1,3-benzenediol], sodium salts

https://huagongshe.com/en/chemical/178958574

H acid molecular structure

Identifiers & Physical Properties

CAS No.98073-03-1
Molecular formulaC10H9NO7S2
Average molar mass319.3 g/mol
SMILESNc1cc(S(=O)(=O)O)cc2cc(S(=O)(=O)O)cc(O)c12
InChIKeyAPRRQJCCBSJQOQ-UHFFFAOYSA-N
ChEMBLCHEMBL60494
EC No.201-975-7

Chemical & Physical Properties

XLogP0.2
Topological polar surface area172
Hydrogen bond donors4
Hydrogen bond acceptors8
Rotatable bonds2
Heavy atoms20
Formal charge0
Complexity561
Physical DescriptionDry Powder

Safety & Regulations

GHS classificationThis chemical does not meet GHS hazard criteria for 1.3% (2 of 150) of reports.DangerH302+H332 (69.3%): Harmful if swallowed or if inhaled [Warning Acute toxicity, oralacute toxicity, inhalation]P260, P261, P264, P264+P265, P270, P271, P280, P301+P317, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P351+P338, P305+P354+P338, P316, P317, P319, P321, P330, P332+P317, P337+P317, P362+P364, P363, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 150 reports by companies from 5 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.Not Classified
Regulatory informationChemical: 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-Chemical: 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, diazotized, coupled with diazotized 2-[(4-aminophenyl)amino]-5-nitrobenzenesulfonic acid, diazotized 4-nitrobenzenamine and resorcinol, potassium sodium salts2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy- are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)Status: Active Update: 13-03-2013 https://echa.europa.eu/registration-dossier/-/registered-dossier/111502,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, diazotized, coupled with diazotized 2-(4-aminophenyl)amino-5-nitrobenzenesulfonic acid, diazotized 4-nitrobenzenamine and resorcinol, potassium sodium salts: Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.
Other safety informationIMAP assessments - 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-, diazotized, coupled with diazotized 2-[(4-aminophenyl)amino]-5-nitrobenzenesulfonic acid, diazotized 4-nitrobenzenamine and resorcinol, potassium sodium salts: Human health tier I assessment
Hazard Classes and CategoriesAcute Tox. 4 (69.3%)