Brief Introduction of L-Arginine
Molecular Formula: C6H14N4O2
Molecular Weight:174.2
CAS No:74-79-3
Appearance:White rhombus crystals or monoclinic flake crystals
Regular commercial package: 25kg/drum
Benefits of L-Arginine
- Promotes cell division, maintains normal organ function, and promotes normal growth and development.
- Has an anti-inflammatory effect and aids wound healing.
- Promotes protein synthesis and boosts immunity.
- Is a precursor to nitric oxide, helping to dilate blood vessels, thereby increasing blood flow and improving microcirculation.
- Has certain benefits for men’s health, including improving male fertility.
If you have any questions about processing L-Arginine, Highassay’s R&D team is here to help.

What is L-Arginine?
L-Arginine is a non-essential amino acid, but because it is synthesized slowly in the human body, it is considered essential for infants and young children. The required dosage can be obtained through food or nutritional supplements. L-Arginine accelerates metabolism and provides energy through protein synthesis and decomposition, thereby boosting immunity.
Applications of L-Arginine
Highassay adheres to strict quality control (QC) to produce L-Arginine. Buy L-Arginine in bulk from us now to get competitive market prices.
- Feed Additive
Enhance the taste and appetite of animals, while also increasing feed nutrition and boosting immunity. They also accelerate animal development and growth.
- Food Additives
Added to food, they enhance flavor and allow direct cell absorption, improving protein utilization and providing energy. They can also be used as food flavorings.
- Nutritional Supplements
Provide nutrients to the body, replenish essential nutrients, enhance vitality, and boost immunity.
L-Arginine VS L-Citrulline
Similarities: Both play important roles in the human body; both prevent disease and boost immunity by producing nitric oxide; and both eliminate waste products produced during exercise.
Differences: L-Arginine directly contributes to nitric oxide synthesis, while citrulline must first be converted to L-Arginine before nitric oxide synthesis.L- Arginine’s primary function is to increase nitric oxide levels in the short term and is best taken as a pre-workout supplement. L-Citrulline, on the other hand, is more effective for relieving fatigue and improving endurance.
So, you need to choose the right supplement based on your needs.


Dosage Suggestions
Normal adults can obtain L-Arginine through food. They should develop a balanced diet and choose foods high in L-Arginine, such as meat, eggs, nuts, and grains. If these foods are generally consumed in low amounts, an L-Arginine supplement is recommended. However, for certain populations, such as infants, those in growing years, athletes, and those with malnutrition, arginine requirements increase, and appropriate supplementation is also recommended.
Specification of L-Arginine
L-Arginine | CP2020 | EP11 | USP2023 | AJI92 |
Assay | ≥99.0% | 98.5-101.0% | 98.5-101.5% | 99.0-101.0% |
PH | 10.5-12.0 | / | / | 10.5-12.0 |
Specific rotation[a]D20 | +26.9°-+27.9° | +25.5°-+28.5° | / | +26.9°-+27.9° |
Specific rotation[a]D25 | / | / | +26.3°-+27.7° | / |
Transmittance(T430) | ≥98.0% | / | / | ≥98.0% |
Appearance of solution | / | clear & colorless ≤BY6 | / | / |
Chloride(Cl) | ≤0.02% | ≤0.02% | ≤0.05% | ≤0.02% |
Ammonium(NH4) | ≤0.02% | ≤0.02% | / | ≤0.02% |
Sulfate(SO4) | ≤0.02% | ≤0.03% | ≤0.03% | ≤0.02% |
Iron(Fe) | ≤10PPM | ≤10PPM | ≤30PPM | ≤10PPM |
Heavy metals(Pb) | ≤10PPM | / | / | ≤10PPM |
Arsenic | ≤1PPM | / | / | ≤1PPM |
Other amino acids | ≤0.4% | / | Individual impurities≤0.5% | |
Total impurities≤2.0% | conform | |||
Ninhydrin-positive substances | / | Each impurity≤0.2% | ||
Sum of impurities≤ 0.5% | / | / | ||
Loss on drying | ≤0.50% | ≤0.50% | ≤0.50% | ≤0.50% |
Residue on ignition | ≤0.10% | ≤0.10% | ≤0.30% | ≤0.10% |
Endotoxin | <10EU/g | <10EU/g | <10EU/g | / |
Total plate count | ≤ 1000 CFU/g | ≤ 1000 CFU/g | ≤ 1000 CFU/g | ≤ 1000 CFU/g |
Moulds & Yeasts | ≤ 100 CFU/g | ≤ 100 CFU/g | ≤ 100 CFU/g | ≤ 100 CFU/g |