Overview
L-Proline is a non-essential amino acid with a unique cyclic structure, distinguishing it from other amino acids. It plays a critical role in collagen synthesis, wound healing, and joint health. Naturally found in proteins, L-Proline is synthesized in the human body but is also widely used in industrial applications. In the B2B sector, L-Proline is primarily sourced for pharmaceutical formulations, dietary supplements, and cosmetic products. Its stability and solubility make it a versatile ingredient. Suppliers typically offer it in powder form with varying purity levels, catering to different industry needs.
Physical and Chemical Properties
L-Proline appears as a white crystalline powder with a molecular weight of 115.13 g/mol. It has a melting point of 220-222°C, at which it decomposes rather than boiling. The compound is highly soluble in water but only slightly soluble in ethanol, making aqueous solutions the preferred medium for most applications. Its cyclic structure (pyrrolidine) contributes to its stability and unique biochemical properties. Unlike other amino acids, L-Proline is not optically active in the traditional sense due to its rigid ring structure. This property is exploited in chiral synthesis and pharmaceutical research.
Main Applications
In pharmaceuticals, L-Proline is used in drug formulations, particularly in treatments for joint disorders and skin repair. Its role in collagen production makes it valuable in anti-aging creams and wound-healing products. The food industry utilizes it as a flavor enhancer and nutritional supplement. In cosmetics, L-Proline is incorporated into serums and lotions for its skin-repairing properties. It is also used in cell culture media for biotechnological research. The demand for high-purity L-Proline has grown in recent years, driven by advancements in personalized medicine and nutraceuticals.
Safety and Storage
L-Proline is generally recognized as safe (GRAS) by regulatory bodies, with low toxicity levels. However, prolonged exposure to dust should be avoided, as it may cause respiratory irritation. Proper storage involves keeping the compound in a cool, dry place, sealed in moisture-proof containers. For bulk handling, ensure adequate ventilation and use personal protective equipment (PPE) such as gloves and masks. The compound is stable under normal conditions but may degrade if exposed to extreme temperatures or humidity. Always refer to the Material Safety Data Sheet (MSDS) for specific handling guidelines.
B2B Procurement Guide
When procuring L-Proline, prioritize suppliers with certifications such as ISO, GMP, or USP to ensure quality. Key specifications to verify include purity (typically ≥98%), heavy metal content, and residual solvents. Request batch testing reports and certificates of analysis (CoA) for transparency. Bulk buyers should negotiate pricing based on volume, with prices commonly ranging between $20-$50 per kilogram. Consider logistics, such as shipping conditions and lead times, especially for international orders. Establish long-term contracts with reliable suppliers to secure consistent quality and avoid supply chain disruptions.
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