... crystalline powder 3.Quality Standards: CP2010,USP32,EP5,A L-Tryptophan Molecular Formula:C11H12N2O2 Molecular Weight: 204.23Cas No: 73 ... 5%Quality Standards: CP2010,USP32,EP5,AJI97,FCC4,BP L-Tryptophan USP32Test ItemSpecificationAssay98.5%~101.5% Specific rotation [α]D20°-29 ... Relational products: we supply the other amino acids L-AlanineL-Aspartic acidL-ArginineL-Arginine HclL-CysteineL-Cysteine HClL ...