?Methyl L-phenylalaninate hydrochloride , its cas register number is 7524-50-7. It also can be called?L-Phenylalanine, methyl ester, hydrochloride ; Methyl (2S)-2-amino-3-phenylpropanoate hydrochloride ; L-Phenylalanine methyl ester hydrochloride .It is a?white to off-white fine crystalline powder.