L-Lysine monohydrochloride
L-Lysine monohydrochloridehas a higher aqueous solubility than free L-lysine: ~70 g/100 mL at 25 °C (vs. ~63 g/100 mL for free L-lysine), with solubility increasing significantly with temperature (up to 110 g/100 mL at 60 °C). Its dissolution is rapid, endothermic, and free of precipitation in dilute to high-concentration aqueous solutions (up to 60% w/v). This advantage makes it ideal for:
- Liquid formulations (e.g., oral nutritional supplements, animal drinking water additives, pharmaceutical syrups) where high solubility and clear solutions are required.
- Industrial production processes (e.g., fermentation downstream purification, formulation blending) that demand fast dissolution and uniform dispersion in aqueous systems.
In contrast, free L-lysine has lower solubility and may form supersaturated solutions that precipitate during storage, leading to formulation instability.
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