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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 17688981Generated: October 25, 2026

4-Chloro-3-methyl-1H-pyrazole-5-carboxylic acid

MFCD16044442 · 4-chloro-5-methyl-1H-pyrazole-3-carboxylic acid · 4-CHLORO-3-METHYL-1H-PYRAZOLE-5-CARBOXYLIC ACID · 1H-Pyrazole-3-carboxylic acid, 4-chloro-5-methyl- · 4-chloro-3-methyl-1H-pyrazole-5-carboxylic acid(SALTDATA: FREE)

https://huagongshe.com/en/chemical/17688981

4-Chloro-3-methyl-1H-pyrazole-5-carboxylic acid molecular structure

Identifiers & Physical Properties

CAS No.29400-84-8
Molecular formulaC5H5ClN2O2
Average molar mass160.56 g/mol
Monoisotopic mass160.0039551 g/mol
SMILESCc1[nH]nc(C(=O)O)c1Cl
InChIKeyFWSYEYQXPSSQMV-UHFFFAOYSA-N
PubChem CID17688981
ChEMBLCHEMBL393062
EC No.801-868-0

Chemical & Physical Properties

XLogP1.1
Topological polar surface area66
Hydrogen bond donors2
Hydrogen bond acceptors3
Rotatable bonds1
Heavy atoms10
Formal charge0
Complexity153
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH302-H315-H319-H335
GHS precautionary statementsP261-P264-P270-P271-P280-P301+P312-P302+P352-P304+P340-P305+P351+P338-P330-P332+P313-P337+P313-P362-P403+P233-P405-P501

Safety & Regulations

GHS classificationWarningH315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]H319 (100%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]H335 (100%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposureRespiratory tract 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 2 reports by companies from 2 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.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.
Hazard Classes and CategoriesSkin Irrit. 2 (100%)Eye Irrit. 2A (100%)STOT SE 3 (100%)
Signal wordWarning
GHS pictogramGHS07
GHS hazard statementsH302-H315-H319-H335
GHS precautionary statementsP261-P264-P270-P271-P280-P301+P312-P302+P352-P304+P340-P305+P351+P338-P330-P332+P313-P337+P313-P362-P403+P233-P405-P501