L-Leucine, known chemically as H-Leu-OH, stands as a pivotal amino acid with extensive applications in both peptide synthesis and nutritional science. Its status as an essential amino acid means it is critical for human health and plays a fundamental role in numerous biological pathways. For scientists and manufacturers, understanding the characteristics and utility of L-Leucine is key to unlocking its full potential.

The chemical identity of L-Leucine is defined by its molecular formula, C6H13NO2, and a molecular weight of 131.17 g/mol. It typically presents as a white crystalline powder, with a high melting point exceeding 300°C, indicative of its stable nature. The unique CAS number assigned to L-Leucine is 16948-36-0. These physical and chemical properties are important for its handling and application in various chemical processes, especially those requiring high purity and defined characteristics.

In the field of peptide synthesis, L-Leucine serves as a fundamental building block. Peptides, composed of amino acid chains, are crucial for a myriad of biological functions and are increasingly utilized in pharmaceuticals and advanced research. The accurate incorporation of L-Leucine into a peptide sequence is vital for achieving the desired biological activity and structural integrity. Consequently, researchers and pharmaceutical companies rely on high-quality L-Leucine sourced from reputable manufacturers. Suppliers in China are significant contributors to the global supply of this essential amino acid.

Separately, L-Leucine holds immense importance in nutritional science. As one of the three branched-chain amino acids (BCAAs), it plays a critical role in stimulating muscle protein synthesis, aiding in muscle repair, and providing energy during exercise. This makes it a key ingredient in sports nutrition supplements and recovery products. Its impact on metabolic regulation and overall health continues to be an active area of research.

For professionals looking to procure L-Leucine, focusing on manufacturers that provide consistently high-quality products is essential. The availability of detailed specifications and Certificates of Analysis ensures that the L-Leucine meets the stringent requirements for both synthesis and nutritional applications. Sourcing from established Chinese manufacturers can offer a balance of quality and cost-effectiveness, supporting a wide range of projects from laboratory research to commercial production.

In summary, L-Leucine (H-Leu-OH) is an indispensable amino acid derivative that bridges the gap between chemical synthesis and biological function. Its critical role as a peptide building block and its profound impact on nutritional science highlight its versatility and importance. By understanding its properties and ensuring reliable sourcing, researchers and manufacturers can effectively utilize L-Leucine to advance their respective fields.