Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 5934-29-2, Whether you call it L-Histidine Monohydrochloride, L-Histidine Hydrochloride or L-alpha-Amino-4(or 5)-imidazolepropionic Acid Monohydrochloride you can be assured the L-Histidine Monohydrochloride products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.