Overview
Phenyl 4-Hydroxybenzoate is an ester derived from 4-hydroxybenzoic acid and phenol. It is commonly used as a preservative due to its antimicrobial properties, effectively inhibiting the growth of bacteria, yeast, and molds. The compound is favored in industries where product shelf-life extension is critical, such as cosmetics, pharmaceuticals, and food. Its chemical stability and low toxicity make it a reliable choice for formulations requiring long-term preservation. However, regulatory scrutiny on parabens has increased, prompting manufacturers to ensure compliance with safety guidelines.
Physical and Chemical Properties
Phenyl 4-Hydroxybenzoate appears as a white crystalline powder with a mild odor. It has a molecular weight of 214.22 g/mol and a melting point range of 115-118°C. The compound is soluble in organic solvents like ethanol and ether but exhibits limited solubility in water. Its antimicrobial efficacy is attributed to the hydroxyl group, which disrupts microbial cell membranes. The compound remains stable under typical storage conditions but may degrade under extreme pH or high temperatures.
Main Applications
The primary use of Phenyl 4-Hydroxybenzoate is as a preservative in cosmetics, including creams, lotions, and shampoos. It prevents microbial contamination, ensuring product safety and longevity. In pharmaceuticals, it is added to topical formulations and oral medications to maintain sterility. The food industry employs it as a preservative in processed foods, though its use is more restricted due to regulatory limits. Its effectiveness at low concentrations makes it a cost-efficient option for manufacturers.
Safety and Storage
While Phenyl 4-Hydroxybenzoate is generally regarded as safe, prolonged exposure may cause skin irritation or allergic reactions. Proper handling with gloves and eye protection is recommended. Storage should be in a cool, dry environment, away from direct sunlight to prevent degradation. Regulatory bodies like the FDA and EU have established permissible limits for its use in consumer products. Manufacturers must adhere to these guidelines to ensure compliance and consumer safety.
B2B Procurement Guide
When procuring Phenyl 4-Hydroxybenzoate, buyers should prioritize suppliers who provide detailed Certificates of Analysis (COA) to verify purity and composition. Bulk purchases typically offer cost advantages, but storage capacity must be considered. Quality standards such as USP, EP, or FCC compliance should be confirmed. Additionally, buyers should evaluate supplier reliability, lead times, and logistical support to ensure seamless integration into production processes.
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