Name l-arginine-l-pyroglutamate Chinese names l-+½¦¦dß l-+¦¦F¦¦dß Molecular structure Molecular formula c6h14n4o2.C5h7no3 Molecular weight 303.06 Cas registry number 56265-06-6 Einecs 260-081-5 Specification: Item specification Description white crystals or crystalline powder Specific rotation [ªß]d20 +16.5íp~+18.5íp State of solution (transmittance) clear and colorless Nlt 95.0% Chloride nmt 0.020% Ammonium nmt 0.02% Sulfate nmt 0.020% Iron nmt 10ppm Heavy metals (as pb) nmt 10ppm Arsenic nmt 1ppm Water content nmt 2.00% Residue on ignition (sulfated) nmt 0.10% Assay 98.5~101.5% In-house standard