Phenol Aqueous Solution (5%): FAQs for Lab Use

Phenol Aqueous Solution (5%) is a ready-to-use aqueous preparation of phenol commonly employed in research laboratories for disinfection, biological assays, and as a reference reagent in various analytical protocols.

Product Name

Phenol Aqueous Solution (5%)

SKU

P1529603

Concentration

5% (w/v) phenol in water

Physical Form

Clear to slightly turbid aqueous liquid

Primary Use

Disinfection, biological assays, analytical reference applications

Storage Condition

Store at room temperature, away from light and heat sources; keep container tightly closed

What Is Phenol Aqueous Solution (5%)?

Phenol Aqueous Solution (5%) (SKU: P1529603) is a pre-formulated solution containing 5% phenol (carbolic acid, C₆H₅OH) dissolved in purified water. Phenol is a classical aromatic compound with well-established antimicrobial and protein-denaturing properties. At the 5% concentration, it has historically been used as a disinfectant and is also applied in certain biochemical assays and as a laboratory reference standard. The ready-to-use format eliminates the need for researchers to handle and weigh neat phenol crystals, reducing exposure risk and preparation time.

Common Laboratory Applications

Phenol Aqueous Solution (5%) is used across a range of laboratory workflows. Key applications include:

• Antimicrobial and disinfection studies: The 5% solution serves as a benchmark disinfectant, particularly in phenol coefficient testing where the efficacy of other disinfectants is compared against phenol under standardized conditions.
• Colorimetric carbohydrate assays: Dilute phenol solutions are employed in the phenol–sulfuric acid method for total carbohydrate quantification in biological and food samples.
• Protein denaturation and fixation: Phenol's ability to denature proteins makes it useful in certain histological and microbiological fixation protocols.
• Reference standard: Used as a reference or positive control in antimicrobial susceptibility and disinfection validation experiments.

Researchers should verify that the 5% concentration is appropriate for their specific protocol before use.

Safety Handling and Storage

Phenol is a hazardous chemical that requires careful handling even at the 5% aqueous concentration. The following precautions are essential:

• Personal Protective Equipment (PPE): Always wear chemical-resistant gloves (e.g., nitrile or neoprene), a laboratory coat, and eye protection. Phenol can cause severe skin burns and is readily absorbed through the skin.
• Ventilation: Work in a fume hood or well-ventilated area to avoid inhalation of vapors.
• First Aid: In case of skin contact, flush immediately with large amounts of water; do NOT use ethanol. Seek medical attention promptly.
• Storage: Store the tightly sealed container at room temperature, away from direct light, heat sources, and incompatible materials (strong oxidizers). Ensure the storage area is well ventilated.
• Disposal: Dispose of phenol-containing waste according to local institutional and governmental hazardous waste regulations.

Always consult the Safety Data Sheet (SDS) for P1529603 before first use.

Specification, Grade and Purity Considerations

Phenol Aqueous Solution (5%) from Aladdin Scientific (P1529603) is intended for research and laboratory use. When evaluating this product for your application, consider the following:

• Concentration accuracy: The solution is formulated at 5% (w/v). If your protocol requires a different concentration, appropriate dilution with ultrapure water or adjustment to the protocol should be performed.
• Purity: Specific purity grades and analytical specifications (e.g., absence of heavy metals, low UV-absorbing impurities) should be confirmed by reviewing the product Certificate of Analysis (CoA) available from Aladdin Scientific.
• Compatibility: Ensure the aqueous formulation is compatible with downstream applications; for some molecular biology applications (e.g., RNA extraction), saturated phenol buffered at specific pH values is used rather than a simple 5% aqueous solution.
• Lot-to-lot consistency: Contact Aladdin Scientific technical support for lot-specific CoA documentation if required for regulatory or quality assurance purposes.

Ordering, Shipping and Returns

Phenol Aqueous Solution (5%) (P1529603) can be ordered directly through the Aladdin Scientific website or via your institutional procurement system. Please note the following logistics considerations:

• Hazardous goods shipping: As phenol is classified as a hazardous material, shipment may be subject to carrier restrictions and additional dangerous goods surcharges. Delivery timelines may vary depending on destination and carrier regulations.
• Packaging: The product is packaged to comply with applicable transport regulations for hazardous chemicals. Inspect packaging upon receipt and report any damage immediately.
• Returns: Due to the hazardous nature of phenol, returns may be subject to specific conditions. Contact Aladdin Scientific customer service before initiating any return.
• Cold chain requirements: Confirm current storage and shipping requirements with Aladdin Scientific, as conditions may be updated based on regulatory guidance.

For pricing, volume discounts, or institutional purchasing agreements, contact Aladdin Scientific sales or procurement teams directly.

Frequently asked questions

What is Phenol Aqueous Solution (5%) used for in the laboratory?

Phenol Aqueous Solution (5%) is used as a benchmark disinfectant in phenol coefficient testing, as a reagent in the phenol–sulfuric acid colorimetric assay for total carbohydrate quantification, and as a reference standard or positive control in antimicrobial and disinfection validation studies. It may also be applied in certain protein denaturation and fixation protocols.

Is Phenol Aqueous Solution (5%) safe to handle on the lab bench without a fume hood?

No. Even at 5% concentration, phenol poses significant hazards including skin absorption, corrosive burns, and vapor inhalation risks. All handling should be performed in a fume hood or adequately ventilated area, with appropriate PPE including chemical-resistant gloves, a lab coat, and eye protection. Consult the SDS for P1529603 for full hazard information.

Can Phenol Aqueous Solution (5%) be used directly for RNA or DNA extraction?

No, Phenol Aqueous Solution (5%) is not formulated for nucleic acid extraction. RNA and DNA extraction protocols typically require saturated phenol that is pH-buffered (e.g., pH 4.0 for RNA or pH 7.0–8.0 for DNA), often combined with chloroform and isoamyl alcohol. The 5% aqueous formulation is intended for disinfection, carbohydrate assays, and similar applications, not for molecular biology extraction workflows.

How should Phenol Aqueous Solution (5%) be stored to maintain stability?

Store Phenol Aqueous Solution (5%) at room temperature in a tightly sealed container, away from direct light, heat, and incompatible materials such as strong oxidizers. Phenol can oxidize over time upon exposure to air and light, potentially causing the solution to discolor (turn pink or red). Discolored solutions should be assessed for suitability before use. Always refer to the product label and SDS for current storage recommendations.

What should I do if Phenol Aqueous Solution (5%) contacts my skin?

Immediately flush the affected area with large amounts of water for at least 15–20 minutes. Do NOT use ethanol, as it may increase phenol absorption through the skin. Remove contaminated clothing while flushing. Seek immediate medical attention, as phenol is rapidly absorbed through the skin and can cause systemic toxicity even from seemingly minor exposures. Always inform medical personnel that the exposure involved phenol.

How does Phenol Aqueous Solution (5%) differ from phenol used in phenol–chloroform extraction kits?

Phenol Aqueous Solution (5%) is a simple dilute aqueous solution intended for disinfection and assay applications. Phenol used in phenol–chloroform extraction is saturated (approximately 88% w/w phenol) and is pH-buffered with appropriate buffers such as Tris to the required pH for nucleic acid extraction. These are distinct formulations with different concentrations, pH values, and intended applications; they are not interchangeable.

References

1. Block, S.S. (Ed.) Disinfection, Sterilization, and Preservation. 5th ed. Lippincott Williams & Wilkins, 2001. [Phenol as a disinfectant benchmark]
2. Dubois, M., Gilles, K.A., Hamilton, J.K., Rebers, P.A., Smith, F. Colorimetric method for determination of sugars and related substances. Analytical Chemistry, 1956, 28(3), 350–356. [Phenol–sulfuric acid carbohydrate assay] doi:10.1021/ac60111a017
3. Sambrook, J., Russell, D.W. Molecular Cloning: A Laboratory Manual. 3rd ed. Cold Spring Harbor Laboratory Press, 2001. [Phenol–chloroform extraction protocols]

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