... in ether. Production Methods : L-lysine generally L-lysine hydrochloride [657-27-2] supply market, free L-lysine vulnerable ... and are difficult to keep for long. L-lysine hydrochloride is relatively stable, and not deliquescence facilitate preservation. But ... Test ResultAppearanceBrown powder, odourless or slightly specific odourConformContent≥98.5%98.71%Specific Optical Rotation+18.0°~+21.5°+20.87°Loss ...