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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 7009Generated: October 23, 2026

H acid

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

https://huagongshe.com/en/chemical/7009

H acid molecular structure

Identifiers & Physical Properties

CAS No.90-20-0
Molecular formulaC10H9NO7S2
Average molar mass319.3 g/mol
Monoisotopic mass318.98204397 g/mol
SMILESNc1cc(S(=O)(=O)O)cc2cc(S(=O)(=O)O)cc(O)c12
InChIKeyAPRRQJCCBSJQOQ-UHFFFAOYSA-N
PubChem CID7009
ChEMBLCHEMBL60494
EC No.201-975-7
DTXSIDDTXSID0046981

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]H302 (69.3%): Harmful if swallowed [Warning Acute toxicity, oral]H314 (26.7%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]H315 (72%): Causes skin irritation [Warning Skin corrosion/irritation]H319 (72%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]H332 (69.3%): Harmful if inhaled [Warning Acute toxicity, inhalation]H335 (72%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposureRespiratory tract irritation]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.Reported as not meeting GHS hazard criteria per 2 of 150 reports by companies.There are 4 notifications provided by 148 of 150 reports by companies with hazard statement code(s).Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website.
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%)Skin Corr. 1B (26.7%)Skin Irrit. 2 (72%)Eye Irrit. 2 (72%)STOT SE 3 (72%)