High-Purity Solvents, Polyurethane (PU) and Resin

Phenol

Phenol, also known as carbolic acid or hydroxybenzene ($C_6H_5OH$), is a fundamental aromatic organic compound and a cornerstone of the global chemical industry. It consists of a phenyl group ($C_6H_5$) directly bonded to a hydroxyl group ($-OH$). While historically extracted from coal tar, approximately 95% of modern phenol is produced via the cumene process, which co-produces acetone. In its pure state, phenol is a white, volatile crystalline solid with a characteristically sweet, medicinal odor. It is a weak acid, notably more acidic than aliphatic alcohols due to the resonance stabilization of the phenoxide ion within the aromatic ring. This reactivity makes it a highly effective substrate for electrophilic aromatic substitution. Despite its industrial utility as a precursor to polymers and resins, phenol is hazardous; it is highly corrosive and toxic, capable of causing severe chemical burns and systemic toxicity through rapid dermal absorption, requiring rigorous safety protocols during handling.

Attributes

Key Features and Benefits

High Chemical Reactivity: The hydroxyl group strongly activates the aromatic ring, facilitating rapid ortho- and para-directed substitutions for efficient synthesis of derivatives.
Fundamental Building Block: Serves as a versatile intermediate for a vast array of downstream products, from high-performance plastics to pharmaceuticals.
Biocidal Efficacy: Possesses inherent antimicrobial and antifungal properties, making it an effective precursor for industrial and medical disinfectants.
Solubility Characteristics: Exhibits moderate solubility in water and excellent miscibility in most organic solvents (alcohol, ether, and benzene), allowing for flexible reaction environments.
Thermodynamic Stability: Demonstrates significant stability under standard industrial processing temperatures, ensuring predictable yields in large-scale manufacturing.

Specifications

Technical Highlights

Molecular Profile: Chemical formula $C_6H_5OH$ with a molar mass of 94.11 g/mol.
Physical Constants: Features a melting point of 40.5°C and a boiling point of 181.7°C; it typically requires heating for liquid-state transfer.
Acidity ($pK_a$): The $pK_a$ is approximately 9.95, allowing it to react with strong bases to form water-soluble phenoxide salts.
Oxidation Sensitivity: Readily oxidizes upon exposure to air and light, often transitioning from a colorless solid to a pink or reddish hue.
Safety Classification: Classified as a Category 1B corrosive and acute toxin. It acts as a protoplasmic poison, demanding specialized PPE and immediate decontamination procedures (e.g., Polyethylene Glycol).

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

Polymer and Resin Production: The largest application is the production of Bisphenol-A (BPA) for polycarbonates and phenolic resins (like Bakelite) for adhesives and coatings.
Pharmaceutical Synthesis: Acts as a critical precursor for salicylic acid, the primary intermediate for aspirin and other analgesic medications.
Nylon Intermediates: Used in the production of cyclohexanone, which is subsequently converted into caprolactam and adipic acid for Nylon-6 and Nylon-6,6.
Agrochemicals: Utilized in the synthesis of phenoxy-herbicides, fungicides, and various synthetic plant growth regulators.
Specialty Chemicals: Employed in the manufacturing of alkylphenols for surfactants, antioxidants for rubber/plastics, and as a reagent in molecular biology for DNA/RNA extraction.