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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 466102Generated: October 23, 2026

Benzenesulfonic acid, 4-methyl-, compd. with pyridine (1:1)

https://huagongshe.com/en/chemical/466102

Benzenesulfonic acid, 4-methyl-, compd. with pyridine (1:1) molecular structure

Identifiers & Physical Properties

CAS No.24057-28-1
Molecular formulaC7H8O3S.C5H5N
Average molar mass251.3 g/mol
SMILESCc1ccc(S(=O)(=O)[O-])cc1.c1cc[nH+]cc1
InChIKeyZDYVRSLAEXCVBX-UHFFFAOYSA-N
PubChem CID466102
EC No.246-002-7

Chemical & Physical Properties

Topological polar surface area79.7
Hydrogen bond donors1
Hydrogen bond acceptors3
Rotatable bonds0
Heavy atoms17
Formal charge0
Complexity224
Chemical classesNitrogen Compounds -> Pyridines
Physical DescriptionWhite crystalline solid[Sigma-Aldrich MSDS]

Safety & Regulations

GHS classificationThis chemical does not meet GHS hazard criteria for 1.1% (1 of 95) of reports.WarningH315 (62.1%): Causes skin irritation [Warning Skin corrosion/irritation]P260, P261, P264, P264+P265, P271, P273, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 95 reports by companies from 10 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Regulatory informationChemical: Pyridine, 4-methylbenzenesulfonateStatus: Active Update: 16-12-2019 https://echa.europa.eu/registration-dossier/-/registered-dossier/26654Benzenesulfonic acid, 4-methyl-, compd. with pyridine (1:1): Does not have an individual approval but may be used under an appropriate group standard
Hazards summaryA skin and strong eye irritant[Sigma-Aldrich MSDS] See p-Toluenesulfonic acid. See Pyridine.
Hazard Classes and CategoriesSkin Irrit. 2 (62.1%)