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L-Lysine monohydrochloride

L-Lysine monohydrochloride (molecular formula: C6​H14​N2​O2​⋅HCl, CAS No.: 657-27-2) is the hydrochloride salt form of L-lysine—an essential amino acid for humans and animals that cannot be synthesized de novo and must be obtained from dietary or supplemental sources. The hydrochloride salt is the most commercially used form of L-lysine due to its superior water solubility, chemical stability, and crystallinity compared to free L-lysine (which is prone to hygroscopy and oxidation). Below is a systematic and detailed summary of its core physical and chemical properties, covering molecular characteristics, physical properties (appearance, solubility, melting point, etc.), chemical reactivity, and stability—key parameters for its production, formulation, application, and storage in the food, feed, pharmaceutical, and nutraceutical industries.


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