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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 9837Generated: October 23, 2026

2-(4-Fluorophenyl)acetic acid

2-(4-FLUOROPHENYL)ACETIC ACID · P-FLUOROPHENYLACETIC ACID · Benzeneacetic acid, 4-fluoro- · NSC 402 · Ba 2821 · RARECHEM AL BO 0131 · 4-Fluorophenylacetic · Of the acid fluoride

https://huagongshe.com/en/chemical/9837

2-(4-Fluorophenyl)acetic acid molecular structure

Identifiers & Physical Properties

CAS No.405-50-5
Molecular formulaC8H7FO2
Average molar mass154.14 g/mol
Monoisotopic mass154.04300768 g/mol
SMILESO=C(O)Cc1ccc(F)cc1
InChIKeyMGKPFALCNDRSQD-UHFFFAOYSA-N
PubChem CID9837
EC No.206-972-4
DTXSIDDTXSID0059956

Chemical & Physical Properties

XLogP1.6
Topological polar surface area37.3
Hydrogen bond donors1
Hydrogen bond acceptors3
Rotatable bonds2
Heavy atoms11
Formal charge0
Complexity139
DrugsPharmaceuticals -> Metabolite of Pipamperone
LogP (partition coefficient)1.6
Melting point81-83 °C (lit.)
Boiling point164°C (2.25 torr)
Density1.1850 (estimate)
Flash point>100°C
Storage conditionsSealed in dry,Room Temperature
pKa (acidity coefficient)pK1:4.25 (25°C)
Physical stateShiny Crystalline Powder or Flakes
ColorWhite
SolubilityInsoluble in water.
Merck14,4177
BRN972145
InChIInChI=1S/C8H7FO2/c9-7-3-1-6(2-4-7)5-8(10)11/h1-4H,5H2,(H,10,11)
InChIKeyMGKPFALCNDRSQD-UHFFFAOYSA-N
SMILESC1(CC(O)=O)=CC=C(F)C=C1
CAS DataBase Reference405-50-5(CAS DataBase Reference)
FDA UNIIS5YJV7CAZ1
NIST Chemistry ReferenceBenzeneacetic acid, 4-fluoro-(405-50-5)
EPA Substance Registry SystemBenzeneacetic acid, 4-fluoro- (405-50-5)
UNSPSC Code12352100
NACRESNA.22
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH315-H319-H335
GHS precautionary statementsP264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313-P280g-P305+P351+P338
Personal protective equipment (PPE)dust mask type N95 (US), Eyeshields, Gloves
Hazard symbolsXi
Risk statements (R)38-36/37/38
Safety statements (S)22-24/25-36/37/39-27-26
Water hazard class (WGK)3
TSCA inventory statusTSCA listed
Hazard classIRRITANT
Customs code29163900
Storage class11 - Combustible Solids

Safety & Regulations

GHS classificationThis chemical does not meet GHS hazard criteria for 2% (1 of 51) of reports.WarningH315 (98%): 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 51 reports by companies from 7 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Regulatory informationBenzeneacetic acid, 4-fluoro-: Does not have an individual approval but may be used under an appropriate group standard
Hazard Classes and CategoriesSkin Irrit. 2 (98%)
Personal protective equipment (PPE)dust mask type N95 (US), Eyeshields, Gloves
Water hazard class (WGK)3
TSCA inventory statusTSCA listed
Customs code29163900
Risk statements (R)38-36/37/38
Signal wordWarning
GHS pictogramGHS07
Hazard symbolsXi
Safety statements (S)22-24/25-36/37/39-27-26
Hazard classIRRITANT
Storage class11 - Combustible Solids
GHS hazard statementsH315-H319-H335
GHS precautionary statementsP264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313-P280g-P305+P351+P338

Applications & Uses

Uses

4-Fluorophenylacetic acid is used as an intermediate in the production of fluorinated anesthetics.