Overview
Dichlorophene is an organochlorine compound derived from phenol, primarily recognized for its antimicrobial efficacy. Developed in the mid-20th century, it has become a staple in industrial preservative systems due to its cost-effectiveness and stability. The chemical is regulated under various international standards for pesticidal and biocidal applications. In B2B contexts, dichlorophene is typically supplied in 25 kg fiber drums or custom packaging for large-scale buyers. Technical-grade material (90–95% purity) is common for manufacturing, while purified forms (≥98%) are used in formulations requiring lower impurity levels.
Physical and Chemical Properties
Dichlorophene exhibits low volatility with a vapor pressure of <0.01 mPa at 25°C, making it suitable for long-term product protection. Its phenolic hydroxyl groups contribute to weak acidity (pKa ~7.5), enabling solubility in alkaline media. The compound is photostable but may degrade under prolonged UV exposure. The crystalline structure ensures easy handling and dosing in industrial processes. Its partition coefficient (log Kow 4.1) indicates moderate lipophilicity, facilitating penetration into organic matrices like wood or textiles. Thermal decomposition occurs above 200°C, releasing hydrogen chloride and other hazardous byproducts.
Main Applications
In agriculture, dichlorophene controls fungal growth on crops and storage facilities, often blended with other fungicides. The textile industry uses it as a mildew inhibitor for natural fibers during transport and storage. Its biocidal properties also make it valuable in adhesives, paints, and leather processing. Healthcare applications include disinfectant soaps and surface sanitizers, though regulatory restrictions apply in some regions. Emerging uses include preservation of industrial fluids and as an intermediate in synthesizing higher-value antimicrobial compounds.
Safety and Storage
Dichlorophene requires Hazard Class 9 (Miscellaneous Dangerous Goods) labeling for transport. Workplace exposure limits are typically set at 0.5 mg/m³ (8-hour TWA). Spills should be contained with inert absorbents and disposed of as hazardous waste. Storage facilities must prevent moisture absorption and maintain temperatures below 30°C. Incompatible materials include strong oxidizers and bases. Bulk storage tanks should be corrosion-resistant (e.g., HDPE or stainless steel) with secondary containment.
B2B Procurement Guide
Reputable suppliers provide batch-specific certificates of analysis (CoA) with parameters like melting point range, assay purity, and residual solvent levels. Buyers should audit GMP compliance for pharmaceutical-grade purchases. Regional regulations (e.g., EU Biocidal Products Regulation) may affect import/export requirements. Just-in-time procurement is recommended due to shelf-life considerations (typically 2 years unopened). Sample testing for polymorphic consistency is advised for formulation-critical applications. Spot prices fluctuate with chlorine and phenol feedstock market trends.
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