Overview
Surfactin is a cyclic lipopeptide biosurfactant produced by Bacillus subtilis. It is renowned for its high surface activity, making it one of the most effective biosurfactants known. Its unique structure includes a hydrophilic peptide ring and a hydrophobic fatty acid chain, enabling it to reduce surface tension significantly. Originally discovered in the 1960s, surfactin has gained attention for its broad-spectrum antimicrobial properties and environmental compatibility. Unlike synthetic surfactants, it is biodegradable and non-toxic, making it a preferred choice for sustainable applications in various industries.
Physical and Chemical Properties
Surfactin exhibits remarkable surface tension reduction, capable of lowering water surface tension from 72 mN/m to below 30 mN/m. Its critical micelle concentration (CMC) is exceptionally low, enhancing its efficiency in emulsification and foaming applications. The compound is stable under a wide range of pH levels (3-12) and temperatures (up to 100°C), making it suitable for harsh industrial conditions. Its solubility in both water and organic solvents further broadens its applicability in formulations requiring dual-phase compatibility.
Main Applications
In pharmaceuticals, surfactin is used for its antimicrobial and antiviral properties, particularly in drug delivery systems and wound care. Its ability to disrupt microbial membranes makes it effective against bacteria, fungi, and enveloped viruses. In agriculture, surfactin serves as a biocontrol agent, protecting crops from pathogens while promoting plant growth. It is also employed in bioremediation to break down hydrocarbons in oil spills, leveraging its emulsifying properties to enhance microbial degradation of pollutants.
Safety and Storage
Surfactin is generally regarded as safe (GRAS) due to its natural origin and biodegradability. However, concentrated forms may cause mild skin or eye irritation, necessitating protective equipment during handling. For long-term stability, store surfactin in a cool, dry environment, preferably at temperatures below 25°C. Avoid exposure to moisture and direct sunlight to prevent degradation. Properly sealed containers are recommended to maintain purity and efficacy.
B2B Procurement Guide
When procuring surfactin, prioritize suppliers who provide certificates of analysis (CoA) detailing purity, microbial strain, and production methods. High-purity grades (≥90%) are essential for pharmaceutical and cosmetic applications. Consider the scale of production and batch consistency, especially for large-volume orders. Pricing varies based on purity and volume, with bulk purchases often attracting discounts. Ensure compliance with regional regulations, particularly for use in food or medical products.
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