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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 1502003Generated: October 23, 2026

3-Methyl-isonicotinic acid

https://huagongshe.com/en/chemical/1502003

3-Methyl-isonicotinic acid molecular structure

Identifiers & Physical Properties

CAS No.4021-12-9
Molecular formulaC7H7NO2
Average molar mass137.14 g/mol
Monoisotopic mass137.04767846 g/mol
SMILESCc1cnccc1C(=O)O
InChIKeyOSMAGAVKVRGYGR-UHFFFAOYSA-N
PubChem CID1502003
EC No.676-206-5
DTXSIDDTXSID80960633

Chemical & Physical Properties

XLogP0.7
Topological polar surface area50.2
Hydrogen bond donors1
Hydrogen bond acceptors3
Rotatable bonds1
Heavy atoms10
Formal charge0
Complexity136

Safety & Regulations

GHS classificationWarningH315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]P261, P264, P264+P265, P271, 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 4 reports by companies from 4 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Hazard Classes and CategoriesSkin Irrit. 2 (100%)