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 Hydrate, L-&#945, -Amino-4(or 5)-imidazolepropionic Acid Monohydrochloride or L-Histidine Hydrochloride you can be assured the L-Histidine Monohydrochloride Hydrate products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.