CAS 5934-29-2 appears in our catalog under these names: L-Histidine monohydrochloride monohydrate, 99% , L-Histidine monohydrochloride monohydrate, 98+%, Thermo Scie, L-Histidine monohydrochloride . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 50g, 250g, 500g, 100g, 1kg, 10g.