L-Arginine HCl is the hydrochloride salt form of the amino acid L-Arginine. This means the basic L-Arginine molecule is bound to a hydrochloric acid (HCl) molecule, forming a stable, crystalline powder. It is the most common and cost-effective form of arginine found in dietary supplements.
L-Arginine is a conditionally essential amino acid, meaning the body can produce it, but under certain conditions (like stress, illness, or during periods of growth), dietary intake becomes crucial. Its functions are primarily linked to its role as a precursor to nitric oxide (NO).
This is the most well-known function of L-Arginine.
Due to its blood flow-enhancing effects, it is popular in the fitness industry.
| Characters, Appearance | White or almost white, crystalline powder or colourless crystals |
| Identification | Infrared absorption |
| Assay | 98.5% - 101.5% |
| Residue on Ignition | ≤0.1% |
| Chloride(Cl) | 16.5%–17.1% |
| Sulfate(SO4) | ≤0.03% |
| Lead | ≤1 ppm |


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