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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 18607Generated: October 26, 2026

2-(4-Chlorophenyl)-2-propynoic acid

3-(4-chlorophenyl)propiolic acid · 3-(4-chlorophenyl)prop-2-ynoic acid · (4-chlorophenyl)propiolic acid · (4-Chlorophenyl)propargylic Acid · 3-(4-Chlorophenyl)-2-propynoic Acid · 2-Propynoic acid, 3-(4-chlorophenyl)- · Propiolic acid, (p-chlorophenyl)- (8CI)

https://huagongshe.com/en/chemical/18607

2-(4-Chlorophenyl)-2-propynoic acid molecular structure

Identifiers & Physical Properties

CAS No.3240-10-6
Molecular formulaC9H5ClO2
Average molar mass180.59 g/mol
Monoisotopic mass179.9978071 g/mol
SMILESO=C(O)C#Cc1ccc(Cl)cc1
InChIKeyHXUUKDJAFBRYMD-UHFFFAOYSA-N
PubChem CID18607
ChEMBLCHEMBL3274820
EC No.841-890-8
DTXSIDDTXSID20186113

Chemical & Physical Properties

XLogP2.7
Topological polar surface area37.3
Hydrogen bond donors1
Hydrogen bond acceptors2
Rotatable bonds1
Heavy atoms12
Formal charge0
Complexity227
Chemical classesOther Classes -> Organic Acids
SpringerMaterials PropertiesDensity
Color/FormCRYSTALS FROM ACETIC ACIDPLATES FROM BENZENE
SolubilityINSOL IN WATERSOL IN HOT BENZENE, ACETIC ACID
Melting point192-193 °C
Physical DescriptionSolid[HSDB]
Boiling point330.2±34.0 °C(Predicted)
Density1.40±0.1 g/cm3(Predicted)
Storage conditions2-8°C
Physical statepowder to crystal
pKa (acidity coefficient)2.46±0.10(Predicted)
ColorWhite to Light yellow to Light orange
FDA UNII4GM85LD7I6
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH319-H315
GHS precautionary statementsP264-P280-P305+P351+P338-P337+P313P-P264-P280-P302+P352-P321-P332+P313-P362
Customs code2916399090
Hazardous substances data3240-10-6(Hazardous Substances Data)

Safety & Regulations

GHS classificationDangerH302 (50%): Harmful if swallowed [Warning Acute toxicity, oral]P261, P264, P264+P265, P270, P271, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P305+P354+P338, P317, P319, P321, P330, 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.
Hazard Classes and CategoriesAcute Tox. 4 (50%)
Customs code2916399090
Signal wordWarning
GHS pictogramGHS07
GHS hazard statementsH319-H315
GHS precautionary statementsP264-P280-P305+P351+P338-P337+P313P-P264-P280-P302+P352-P321-P332+P313-P362
Hazardous substances data3240-10-6(Hazardous Substances Data)