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L_Arginine HCL



L_Arginine HCL is an amino acid classified as a semi-essential, nitrogen-rich amino acid that the body cannot synthesize. Therefore, the body relies on obtaining it from foods rich in arginine, such as dairy products, and from dietary supplements. The reason bodybuilders are particularly interested in this amino acid is its involvement in numerous physiological processes within the body.

Scientific Data



  • Other names      2-Amino-5-guanidinopentanoic acid
  • Registration number (CAS)     7200-25-1 157-06-2 R 74-79-3 S
  • PubChem         232 71070 6322
  • Simplified molecular text linear input parameters
  • International Chemical Identifier
  • chemical formula        C6H14N4O2
  • molar mass     174.2 g.mol −1
  • Appearance     white crystals
  • The smell        odorless
  • Melting point  260 °C, 533 °K, 500 °F
  • solubility in water       87.1 g·L −1 (20 °C)            log P            −1.652
  • Acidity ( pKa )  2.488
  • Basicity (p K b )           11.509
  • Standard heat of formation Δf H₂O 298         (−624.9) -(−622.3) kJ·mol −1
  • Standard enthalpy changes for combustion       ΔcH₂O 298   (−3.7396) -(−3.7370)       megajoules ·mol −1
  • Standard molar entropy S o 298         250.6 J·K −1 · mol −1
  • Specific heat, C           232.8 J·K −1 · mol −1 (23.7 °C)
  • GHS hazard code         GHS07: Harmful
  • Hazard description according to GHS WARNING
  • GHS hazard data         H319
  • Protective data according to GHS       P305+351+338
  • Risk Coding      irritant Xi
  • Risk description           R36
  • Precautionary warnings          S26

L_Argenine HCL uses:



• Uses of L_Argenine HCL in the veterinary medicine sector:

L-Arginine HCL is a very important functional amino acid in veterinary medicine and animal nutrition, playing vital roles that extend beyond simply building protein. It is primarily used to support cardiovascular health, improve reproductive performance, and enhance immunity, especially in high-intensity animal production systems.


• Uses of L_Argenine HCL in Human Medicine:

L_Arginine HCL is widely used medically to boost nitric oxide production, which helps dilate blood vessels and improve circulation, treat erectile dysfunction, heart disease, and high blood pressure, as well as enhance athletic performance and accelerate wound healing. It is also used to support immunity and growth in children.


• Uses of L_Argenine HCL in Agriculture:

L_Arginine HCL is a functional essential amino acid in plants, playing vital roles in growth, development, and response to environmental stress, as well as being a major nitrogen reservoir.


• Use of L_Argenine HCL in the Cosmetics Sector:

L_Arginine HCL is an essential amino acid in cosmetics, acting as a natural moisturizer, collagen booster, and anti-aging agent. It is used to repair the skin, improve its elasticity, and deeply hydrate it. It is also included in hair products to stimulate follicles and treat hair loss. It is considered safe, non-toxic, and non-comedogenic.


• Use of L_Argenine HCL in Dietary Supplements and Muscle Building:

L-Arginine HCL is a popular dietary supplement used to enhance athletic performance and build muscle. It acts as a precursor to nitric oxide (NO), which dilates blood vessels, increasing blood flow, oxygen, and nutrients to the muscles, and reducing fatigue. It is recommended to take it 30 minutes before exercise, in safe doses that typically range from 2 to 20 grams daily.