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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 14770682Generated: October 23, 2026

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

4-chloro-3-Ethyl-1-methyl-1H-Pyrazole-5- carboxylic · 4-chloro-5-ethyl-2-methyl-3-pyrazolecarboxylic acid · 1-Methyl-3-ethyl-4-chloro-5-pyrazole carboxylic acid · 4-CHLORO-3-ETHYL-1-METHYL PYRAZOLE-5-CARBOXYLIC ACID · 4-Chloro-3-ethyl-1-methyl-1H-pyrazole-5-carboxylicaci · 4-CHLORO-3-ETHYL-1-METHYL-1H-PYRAZOLE-5-CARBOXYLIC ACID · 1H-Pyrazole-5-carboxylic acid, 4-chloro-3-ethyl-1-Methyl- · Ethyl 4-chloro-5-ethyl-1-methyl- 1H-pyrazole-3-carboxylic acid

https://huagongshe.com/en/chemical/14770682

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

Identifiers & Physical Properties

CAS No.127892-62-0
Molecular formulaC7H9ClN2O2
Average molar mass188.61 g/mol
Monoisotopic mass188.0352552 g/mol
SMILESCCc1nn(C)c(C(=O)O)c1Cl
InChIKeyNXAIFVHVBHMNJS-UHFFFAOYSA-N
PubChem CID14770682
EC No.836-047-6
DTXSIDDTXSID60563848

Chemical & Physical Properties

XLogP1.6
Topological polar surface area55.1
Hydrogen bond donors1
Hydrogen bond acceptors3
Rotatable bonds2
Heavy atoms12
Formal charge0
Complexity188
Melting point164 °C
Boiling point339.5±42.0 °C(Predicted)
Density1.40±0.1 g/cm3(Predicted)
Storage conditionsunder inert gas (nitrogen or Argon) at 2-8°C
SolubilityChloroform (Slightly, Heated), Methanol (Slightly)
pKa (acidity coefficient)1.90±0.38(Predicted)
Physical stateSolid
ColorWhite to Off-White
InChIInChI=1S/C7H9ClN2O2/c1-3-4-5(8)6(7(11)12)10(2)9-4/h3H2,1-2H3,(H,11,12)
InChIKeyNXAIFVHVBHMNJS-UHFFFAOYSA-N
SMILESN1(C)C(C(O)=O)=C(Cl)C(CC)=N1
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH315-H319
GHS precautionary statementsP264-P280-P302+P352-P337+P313-P305+P351+P338-P362+P364-P332+P313
Customs code2933.19.9000

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 (50%): 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. 2 (100%)STOT SE 3 (50%)
Customs code2933.19.9000
Signal wordWarning
GHS pictogramGHS07
GHS hazard statementsH315-H319
GHS precautionary statementsP264-P280-P302+P352-P337+P313-P305+P351+P338-P362+P364-P332+P313

Applications & Uses

Uses

4-Chloro-3-ethyl-1-methyl-1H-pyrazole-5-formic Acid is a useful reagent for the synthesis of anti-microbial compounds.

4-Chloro-3-ethyl-1-methyl-1H-pyrazole-5-carboxylic acid|Huagongshe