Overview
Methyl p-hydroxybenzoate, commonly known as methylparaben, is an ester of p-hydroxybenzoic acid. It is widely recognized for its antimicrobial properties, making it a popular preservative in various industries. The compound is synthetically produced and has been extensively studied for its efficacy and safety. As a preservative, methylparaben inhibits the growth of bacteria, yeast, and molds, thereby extending the shelf life of products. Its effectiveness, coupled with its relatively low cost, has led to its widespread use in food, cosmetics, and pharmaceutical formulations.
Physical and Chemical Properties
Methyl p-hydroxybenzoate is a white crystalline powder with a slight aromatic odor. It has a molecular weight of 152.15 g/mol and a density of 1.209 g/cm³. The compound melts at 125-128 °C and is soluble in organic solvents like ethanol and ether, but only slightly soluble in water. Its chemical stability under normal conditions makes it suitable for use in a variety of formulations. However, it can degrade under extreme pH conditions or high temperatures, which may affect its preservative efficacy.
Main Applications
Methylparaben is predominantly used as a preservative in the food industry to prevent spoilage in products such as baked goods, beverages, and dairy. In cosmetics, it is found in shampoos, lotions, and makeup to inhibit microbial growth. The pharmaceutical industry also utilizes methylparaben in topical creams, ointments, and oral medications. Its broad-spectrum antimicrobial activity and compatibility with other ingredients make it a versatile choice for preserving product integrity.
Safety and Storage
While methylparaben is generally recognized as safe (GRAS) by regulatory agencies, it can cause skin irritation or allergic reactions in sensitive individuals. Proper handling, including the use of gloves and masks, is recommended to minimize exposure. Storage should be in a cool, dry place away from direct sunlight and moisture to maintain stability. Bulk quantities should be kept in tightly sealed containers to prevent contamination and degradation.
B2B Procurement Guide
When procuring methylparaben, B2B buyers should prioritize suppliers who provide certificates of analysis (COA) to verify purity and compliance with industry standards. It is essential to ensure that the product meets regulatory requirements for the intended application, such as FDA or EU guidelines. Price negotiations should consider factors like order volume, packaging, and delivery terms. Buyers may also inquire about custom formulations or blends to meet specific product needs.
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