Phenyl Phenylacetate: Properties, Handling & Lab Use Guide

Phenyl phenylacetate is an aromatic ester reagent of interest to synthetic organic chemists for its role as an acylating agent and as a model substrate in esterase and lipase activity studies.

Chemical Name

Phenyl phenylacetate

Molecular Formula

C₁₄H₁₂O₂

Molecular Weight

212.24 g/mol

Compound Class

Aromatic ester

Key Applications

Acylation reactions, enzyme activity assays (esterases/lipases), organic synthesis intermediate

Aladdin SKU

P343158

Storage Recommendation

Store in a cool, dry, well-ventilated area away from heat and ignition sources

Physicochemical Properties

Phenyl phenylacetate is an aromatic ester formed by the esterification of phenylacetic acid with phenol. Its molecular formula is C₁₄H₁₂O₂ with a molecular weight of approximately 212.24 g/mol. The compound features two phenyl rings connected through an ester linkage (–C(=O)–O–), conferring characteristic UV absorbance useful in spectrophotometric assays.

As an ester of a relatively reactive phenol leaving group, phenyl phenylacetate is more electrophilically active toward nucleophiles than simple alkyl phenylacetates, making it a valuable acyl-transfer reagent. It is expected to be a low-melting solid or liquid at room temperature with limited water solubility, and is miscible with common organic solvents such as ethanol, acetone, dichloromethane, and ethyl acetate.

Note: Precise melting point, boiling point, density, and refractive index values should be confirmed against the supplier certificate of analysis or peer-reviewed references prior to use in critical applications.

Laboratory Applications

1. Acylation Reagent in Organic Synthesis: Phenyl phenylacetate serves as a convenient source of the phenylacetyl group. Because phenol is a good leaving group relative to alkoxide, this ester can acylate amines, alcohols, and other nucleophiles under mild conditions, enabling selective N- or O-acylation in multi-step synthetic sequences.

2. Enzyme Activity Substrate: The compound is widely used as a chromogenic or UV-active substrate for esterases, lipases, and acyltransferases. Enzymatic hydrolysis releases phenol, which can be quantified spectrophotometrically (typically monitored near 270 nm), enabling continuous kinetic assays of enzyme activity. This application is analogous to classical p-nitrophenyl ester assays but employing phenyl esters.

3. Reference Standard and Model Compound: Phenyl phenylacetate may serve as a reference compound in method development for HPLC, GC, or mass spectrometry, and as a model substrate when investigating reaction mechanisms of acyl-transfer enzymes or organocatalysts.

4. Chemical Biology and Prodrug Research: Phenyl esters of arylacetic acids have been investigated as prodrug motifs and in bioorthogonal chemistry contexts, providing a chemical handle that is selectively cleaved by specific hydrolytic enzymes.

Safe Handling and Storage

Personal Protective Equipment (PPE): When handling phenyl phenylacetate, wear appropriate PPE including chemical-resistant gloves (e.g., nitrile), safety goggles or a face shield, and a laboratory coat. Work in a well-ventilated fume hood to minimise inhalation of vapours or aerosols.

Skin and Eye Contact: In the event of skin contact, wash the affected area thoroughly with soap and water. For eye contact, immediately irrigate with copious water for at least 15 minutes and seek medical attention. Do not induce vomiting if ingested; seek immediate medical advice.

Fire and Reactivity Hazards: As an organic ester, phenyl phenylacetate may be combustible. Keep away from open flames, sparks, and strong oxidising agents. Use appropriate fire extinguishing media (CO₂, dry chemical, or foam) if a fire occurs.

Storage Conditions: Store in a tightly sealed container in a cool (typically 2–8 °C or room temperature as specified on the product label), dry, and well-ventilated area, away from heat sources and incompatible materials such as strong bases and strong oxidisers. Check the product-specific Safety Data Sheet (SDS) for precise hazard classification and storage temperature.

Waste Disposal: Dispose of waste in accordance with local, regional, and national regulations governing organic chemical waste. Do not pour down the drain without appropriate treatment.

Always consult the Aladdin Scientific Safety Data Sheet (SDS) for product P343158 before use.

Quality, Purity, and Procurement Guidance

Purity Considerations: For enzyme kinetics and quantitative biochemical assays, high-purity phenyl phenylacetate (≥97% or as specified by the supplier) is recommended to minimise interference from impurities that may absorb at the assay wavelength or inhibit enzyme activity. Confirm purity via the certificate of analysis (CoA) supplied with each lot.

Lot-to-Lot Consistency: When using phenyl phenylacetate as a substrate in reproducible assays, record the lot number and purity for each experiment. Significant lot-to-lot variation in impurity profiles can affect enzyme activity measurements.

Aladdin Scientific Product: Phenyl phenylacetate is available from Aladdin Scientific under SKU P343158. Researchers should request the CoA and SDS at the time of purchase. Cross-referencing with the Santa Cruz Biotechnology catalogue number sc-236364 may assist in identifying equivalent material from prior literature.

Solvent Preparation: Stock solutions are typically prepared in anhydrous DMSO, ethanol, or acetonitrile. Aqueous buffer dilutions should be prepared fresh immediately before use, as phenyl esters are susceptible to hydrolysis under aqueous conditions, particularly at elevated pH.

Frequently asked questions

What is phenyl phenylacetate used for in the laboratory?

Phenyl phenylacetate is primarily used as an acylating agent in organic synthesis and as a UV-active substrate for esterases, lipases, and acyltransferases in enzyme activity assays. Enzymatic hydrolysis releases phenol, which can be monitored spectrophotometrically to quantify enzyme kinetics. It may also serve as a reference standard in chromatographic method development.

How should phenyl phenylacetate stock solutions be prepared and stored?

Stock solutions are best prepared in anhydrous organic solvents such as DMSO, ethanol, or acetonitrile to avoid hydrolysis. Aqueous dilutions should be prepared fresh immediately before use because phenyl esters are susceptible to hydrolysis, especially at neutral to alkaline pH. Store stock solutions sealed and protected from moisture at the temperature recommended on the product label or CoA.

Is phenyl phenylacetate the same compound as listed under Santa Cruz sc-236364?

The Aladdin Scientific product P343158 (phenyl phenylacetate) references the Santa Cruz Biotechnology catalogue number sc-236364 as a cross-reference identifier. Researchers should verify equivalence by comparing the CAS number, molecular formula, purity specification, and certificate of analysis between sources before substituting one supplier's material for another in critical assays.

What safety precautions are required when handling phenyl phenylacetate?

Always handle phenyl phenylacetate in a well-ventilated fume hood wearing nitrile gloves, safety goggles, and a laboratory coat. As an organic ester it may be combustible, so keep it away from ignition sources and strong oxidisers. Consult the Safety Data Sheet (SDS) for product P343158 from Aladdin Scientific for complete hazard information and emergency procedures before first use.

At what wavelength is phenol release monitored in phenyl ester enzyme assays?

In enzyme kinetic assays using phenyl esters, the release of free phenol is typically monitored by UV absorbance near 270 nm. Researchers should construct an appropriate phenol standard curve under the assay buffer conditions used, as the molar absorptivity of phenol is pH-dependent. This should be validated in each specific laboratory setup.

References

1. Aladdin Scientific. Product Information: Phenyl phenylacetate, SKU P343158. Aladdin Scientific Corp.
2. Santa Cruz Biotechnology. Phenyl phenylacetate, catalogue number sc-236364. Santa Cruz Biotechnology, Inc.
3. March, J. Advanced Organic Chemistry: Reactions, Mechanisms, and Structure, 4th ed. Wiley-Interscience, 1992. (General reference for ester acylation chemistry.)
4. Sigma-Aldrich / Merck. Phenyl esters as substrates for lipases and esterases: general technical note. (General industry reference; specific publication details require verification.)

Products are supplied for research and development use only. Not for use in humans, animals, diagnosis, or therapy.