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4-Biphenylacetic acid


Linear Formula:
CAS Number:
Molecular Weight:
EC Number:
MDL number:
PubChem Substance ID:

Quality Level




159-160 °C (lit.)


DMSO: soluble 50 mg/mL, clear, colorless to yellow

SMILES string




InChI key


Gene Information

human ... BAD(572)

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General description

4-Biphenylacetic acid is a potential non-steroidal antiinflammatory agent and forms solid inclusion complex with β-cyclodextrin. 4-Biphenylacetic acid on interaction with quinolone antibacterial agents induces functional blockade of the γ-aminobutyric acid receptors.


4-Biphenylacetic acid was used in the synthesis of gastrosparing non-steroidal antiinflammatory drug.


5 g in glass bottle
25 g in poly bottle


Skull and crossbones

Signal Word


Hazard Classifications

Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Certificate of Analysis

Certificate of Origin

Yohei Sakaguchi et al.
Journal of pharmaceutical and biomedical analysis, 55(1), 176-180 (2011-02-12)
Fluorous derivatization followed by fluorous-phase liquid chromatographic (LC) separation exploits the affinity between perfluoroalkyl compounds for highly selective and quantitative isolation of various analytes. However, the applicability of this technique as a simple pretreatment for fluorometric determination in clinical settings...
H Arima et al.
European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences, 6(1), 53-59 (2005-11-01)
The effect of hydroxypropyl-beta-cyclodextrin (HP-beta-CyD) on the cutaneous penetration and activation of ethyl 4-biphenylyl acetate (EBA), a prodrug of non-steroidal anti-inflammatory drug 4-biphenylylacetic acid (BPAA), from hydrophilic ointment was investigated, using hairless mouse skin in vitro. When the hydrophilic ointment...
I Smolders et al.
Antimicrobial agents and chemotherapy, 46(2), 471-477 (2002-01-18)
Fluoroquinolones are antibiotics with central excitatory side effects. These adverse effects presumably result from inhibition of gamma-aminobutyric acid (GABA) binding to GABA(A) receptors. This GABA antagonistic effect is greatly potentiated by the active metabolite of fenbufen, biphenylacetic acid (BPAA). Nevertheless...
A I Khan et al.
Chemical communications (Cambridge, England), (22)(22), 2342-2343 (2002-09-21)
A series of pharmaceutically active compounds including diclofenac, gemfibrozil, ibuprofen, naproxen, 2-propylpentanoic acid, 4-biphenylacetic acid and tolfenamic acid can be reversibly intercalated into a layered double hydroxide, initial studies suggest that these materials may have application as the basis of...
K Akahane et al.
Antimicrobial agents and chemotherapy, 38(10), 2323-2329 (1994-10-01)
The combination of some new quinolone antibacterial agents with 4-biphenylacetic acid (BPAA), a metabolite of fenbufen, is known to specifically induce functional blockade of the gamma-aminobutyric acid (GABA) receptors. The mechanisms of these drug interactions were further examined. Scatchard analysis...

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