L-Arginine monohydrochloride, USPL Arginine is a dibasic, semi essential amino acid. It acts as a precursor for creatinine and is a natural constituent of most of the dietary proteins. It has also been used as a component of SILAC medium. Purity: 98. 5 101. 0% Impurities: endotoxin, tested Grade: USP, EP, suitable for cell culture and manufacturing CAS Number 1119 34 2 Empirical Formula C6H14N4O2HCl Molecular Weight 210. 66 Unless otherwise indicated, the products listed herein are