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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 2392321Generated: November 1, 2026

2-Chloro-1-(3,4-difluorophenyl)ethanone

2-Chloro-1-(3,4-difluorophenyl)ethan-1-one · Fluconazole Impurity 6 · Ticagrelor Impurity 148 · 3,4-Difluorophenacyl chloride · α-Chloro-3,4-difluorobenzophenone · a-Chloro-3,4-difluoroacetophenone · 2-Chloro-3',4'-difluoroacetophenone · 2-chloro-1(3,4-difuorophenyl)ethanone

https://huagongshe.com/en/chemical/2392321

2-Chloro-1-(3,4-difluorophenyl)ethanone molecular structure

Identifiers & Physical Properties

CAS No.51336-95-9
Molecular formulaC8H5ClF2O
Average molar mass190.57 g/mol
Monoisotopic mass189.9996988 g/mol
SMILESO=C(CCl)c1ccc(F)c(F)c1
InChIKeyVMEDAWUIKFAFJQ-UHFFFAOYSA-N
PubChem CID2392321
ChEMBLCHEMBL5282020
EC No.610-651-8
DTXSIDDTXSID40368434

Chemical & Physical Properties

XLogP2.6
Topological polar surface area17.1
Hydrogen bond donors0
Hydrogen bond acceptors3
Rotatable bonds2
Heavy atoms12
Formal charge0
Complexity174
Melting point31-32 °C(Solv: ethanol (64-17-5)water (7732-18-5))
Boiling point256.3±25.0 °C(Predicted)
Density1.353±0.06 g/cm3(Predicted)
Storage conditionsunder inert gas (nitrogen or Argon) at 2-8°C
Solubilitysoluble in Methanol
Physical statepowder to lump
ColorWhite to Light yellow
SensitivityLachrymatory
InChIInChI=1S/C8H5ClF2O/c9-4-8(12)5-1-2-6(10)7(11)3-5/h1-3H,4H2
InChIKeyVMEDAWUIKFAFJQ-UHFFFAOYSA-N
SMILESC(=O)(C1=CC=C(F)C(F)=C1)CCl
CAS DataBase Reference51336-95-9(CAS DataBase Reference)
GHS pictogramGHS05
Signal wordDanger
GHS hazard statementsH314-H290
GHS precautionary statementsP501-P260-P234-P264-P280-P390-P303+P361+P353-P301+P330+P331-P363-P304+P340+P310-P305+P351+P338+P310-P406-P405
Hazard symbolsC,Xi
UN transport numberUN 3261 8/PG II
Hazard classIRRITANT
Packing groupII
Customs code2914790090
REACH registrationsActive

Safety & Regulations

GHS classificationDangerH290 (20%): May be corrosive to metals [Warning Corrosive to Metals]P233, P234, P260, P261, P264, P264+P265, P270, P271, P272, P280, P284, P301+P316, P301+P317, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P351+P338, P305+P354+P338, P316, P317, P319, P321, P330, P332+P317, P333+P317, P337+P317, P342+P316, P362+P364, P363, P390, P403, P403+P233, P405, P406, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 5 reports by companies from 5 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Regulatory informationREACH registered substance: 2-Chloro-1-(3,4-difluorophenyl)ethanone (EC: 610-651-8)
Hazard Classes and CategoriesMet. Corr. 1 (20%)
UN transport numberUN 3261 8/PG II
Customs code2914790090
Signal wordDanger
GHS pictogramGHS05
Hazard symbolsC,Xi
Hazard classIRRITANT
Packing groupII
GHS hazard statementsH314-H290
REACH registrationsActive
GHS precautionary statementsP501-P260-P234-P264-P280-P390-P303+P361+P353-P301+P330+P331-P363-P304+P340+P310-P305+P351+P338+P310-P406-P405

Applications & Uses

Uses

2-Chloro-1-(3,4-difluoro-phenyl)-ethanone is mainly used as an organic synthesis intermediate component. It can be used to prepare (1R,2R)-Ethyl 2-(3,4-difluorophenyl)cyclopropanecarboxylate, (1R,2S)-2-(3,4-Difluorophenyl)cyclopropanamine (R)-2-hydroxy-2- phenylacetate, and 2-Arylcyclopropylamines.