Molecular Structure of 4-Fluorophenylacetic acid (CAS No.405-50-5):
 
Molecular Formula: C₈H₇FO₂
Molecular Weight: 154.138383
IUPAC Name: 2-(4-Fluorophenyl)acetic acid 
CAS No: 405-50-5
EINECS: 206-972-4
H bond acceptors: 2
H bond donors: 1
Freely Rotating Bonds: 2
Polar Surface Area: 26.3 Å²
Index of Refraction: 1.529
Molar Refractivity: 37.36 cm³
Molar Volume: 121 cm³
Surface Tension: 44.5 dyne/cm
Density: 1.272 g/cm³
Flash Point: 114.3 °C
Melting Point: 82-86 ºC
Water Solubility: 8570 mg/L(25ºC)
Enthalpy of Vaporization: 53.17 kJ/mol
Boiling Point: 265.3 °C at 760 mmHg
Vapour Pressure: 0.00461 mmHg at 25°C
Product Categories: Phenylacetic acid series;Aromatic Phenylacetic Acids and Derivatives;Fluorobenzene;API intermediates;Carboxylic Acids;Phenyls Phenyl-Het;C8;Carbonyl Compounds
Canonical SMILES: C1=CC(=CC=C1CC(=O)O)F
InChI: InChI=1S/C8H7FO2/c9-7-3-1-6(2-4-7)5-8(10)11/h1-4H,5H2,(H,10,11)
InChIKey: MGKPFALCNDRSQD-UHFFFAOYSA-N

Safety Information of 4-Fluorophenylacetic acid (CAS No.405-50-5):
Hazard Codes: Xi
Risk Statements: 38-36/37/38
R38:Irritating to skin. 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 22-24/25-36/37/39-27-26
S22:Do not breathe dust. 
S24/25:Avoid contact with skin and eyes. 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection. 
S27:Take off immediately all contaminated clothing. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
WGK Germany: 3
Hazard Note: Irritant
TSCA: T
HazardClass: IRRITANT
HS Code: 29163900

  4-Fluorophenylacetic acid (CAS No.405-50-5), it also can be called p-Fluorophenylacetic acid ; (4-Fluorophenyl)acetic acid ;Benzeneacetic acid, 4-fluoro- ;(4-Fluoro-phenyl)-acetic acid ; 2-(4-Fluorophenyl)Acetic Acid ; 4-Fluorophenylacetic acid 98% .It is white shiny crystalline powder or flakes.