1. Basic Product Profile

• Full IUPAC Name: (2S)-2-amino-5-guanidinopentanoic acid
• Aliases: L-Arginine, L-(+)-Arginine
• CAS Number: 74-79-3
• EINECS: 200-743-4
• Molecular Formula: C6H14N4O2
• Molecular Weight: 174.20
• Chemical Classification: Essential amino acid, nutritional supplement raw material, pharmaceutical intermediate, cosmetic active ingredient
• Core Advantages
  Basic chiral amino acid with guanidinium group, strong water solubility and excellent biocompatibility. It is a precursor of nitric oxide in human body, widely used in sports nutrition, pharmaceutical formulations, cosmetic anti-aging raw materials and food fortifiers. L-type natural configuration with high biological absorption rate, stable under conventional storage conditions.

2. Physical & Chemical Properties

2.1 Physical Index

1. Appearance: White crystalline powder
2. Odor: Odorless
3. Solubility: Freely soluble in water; slightly soluble in ethanol; insoluble in ether, acetone and oil solvents
4. Melting Point: 222–224 °C (decomposition)
5. Specific Optical Rotation [α]D20: +26° ~ +28° (c=8, 5mol/L HCl)
6. pH (10% aqueous solution): 10.5–12.0 (strongly alkaline)
7. Hygroscopy: Slightly hygroscopic under high humidity environment

2.2 Chemical Properties

1. Functional groups: α-amino group, carboxyl group, terminal guanidinium group with strong alkalinity
2. Amphoteric property: Can form salts with both acid and alkali; stable hydrochloride salt is common commercial derivative
3. Condensation reaction: Amino group undergoes peptide bond formation with carboxylic acids to synthesize polypeptide and protein derivatives
4. Thermal Stability: Stable below 180°C; decomposes above melting point to release ammonia and guanidine substances
5. Acid & Alkali Stability: Stable in weak acid and neutral medium; long-term heating in strong alkali leads to side chain degradation
6. Photostability: No obvious discoloration under normal light storage
7. Compatibility: Compatible with most water-soluble nutritional raw materials; incompatible with strong oxidants, concentrated strong acid

3. Main Application Fields

3.1 Nutritional & Sports Supplement (Core Usage)

1. Sports nutrition raw material: Promotes blood circulation, enhances muscle endurance, relieves fatigue;
2. Health food additive: Improves immunity, regulates male reproductive health, assists cardiovascular care;
3. Infant formula and functional food nutritional fortifier.

3.2 Pharmaceutical Intermediate

1. Raw material for amino acid infusion, compound amino acid injection;
2. Precursor of cardiovascular drugs, wound repair preparations and liver-protecting formulations;
3. Raw material for surgical tissue repair biological agents.

3.3 Cosmetic Raw Material

3.4 Biochemical Laboratory Reagent

4. Quality Specification Table