Overview
Isopropyl p-Hydroxybenzoate, also known as Isopropylparaben, is a synthetic ester of p-hydroxybenzoic acid. It is widely used as a preservative due to its antimicrobial properties, which help extend the shelf life of various products. The compound is particularly valued in industries where microbial contamination can compromise product quality or safety. Isopropylparaben is part of the paraben family, which includes other esters like methylparaben and propylparaben. While parabens have faced scrutiny over potential health concerns, Isopropylparaben remains approved for use in many applications when used within regulated limits. Its efficacy against a broad spectrum of microorganisms makes it a preferred choice for formulators.
Physical and Chemical Properties
Isopropyl p-Hydroxybenzoate is a white crystalline powder with a melting point range of 84-86°C. It is soluble in organic solvents such as ethanol and propylene glycol but has limited solubility in water. This property influences its formulation in aqueous and non-aqueous systems. The compound exhibits stability under normal storage conditions, but prolonged exposure to high temperatures or UV light may degrade its efficacy. Its molecular weight of 180.20 g/mol and chemical structure contribute to its preservative action, inhibiting the growth of bacteria, yeast, and molds.
Main Applications
Isopropyl p-Hydroxybenzoate is primarily used as a preservative in cosmetics, pharmaceuticals, and food products. In cosmetics, it is found in creams, lotions, and shampoos to prevent microbial growth. The pharmaceutical industry incorporates it into topical formulations and oral medications to ensure product stability. In the food industry, it is used as a food additive, though its application is more restricted compared to other parabens. Its ability to maintain product integrity without altering taste or appearance makes it a versatile preservative. Regulatory approvals vary by region, so compliance with local guidelines is essential for manufacturers.
Safety and Storage
Isopropyl p-Hydroxybenzoate should be handled with care to avoid inhalation or direct contact with skin and eyes. Personal protective equipment (PPE), such as gloves and goggles, is recommended during handling. In case of exposure, rinse thoroughly with water and seek medical advice if irritation persists. Storage conditions are critical to maintaining the compound's efficacy. It should be kept in a cool, dry place, away from direct sunlight and moisture. Properly sealed containers are necessary to prevent contamination and degradation. Shelf life typically ranges from 2-3 years when stored correctly.
B2B Procurement Guide
When procuring Isopropyl p-Hydroxybenzoate, B2B buyers should prioritize suppliers who adhere to regulatory standards such as FDA or EU guidelines. Certificates of Analysis (CoA) should be requested to verify purity, which commonly ranges from 98% to 99.5%. Price varies based on quantity, purity, and supplier reputation. Bulk purchases often attract discounts, but buyers should balance cost with quality. Lead times and shipping conditions (e.g., temperature control) should also be considered to ensure product integrity upon arrival. Establishing long-term relationships with reliable suppliers can mitigate supply chain risks.
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