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L-Histidine hydrochloride

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L-Histidine hydrochloride Basic information
L-Histidine hydrochloride Chemical Properties
  • Melting point:240-245 °C (dec.)
  • alpha [α]D20 +7.0~+10.0°(c=2,HCl)
  • storage temp. Inert atmosphere,Room Temperature
  • CAS DataBase Reference1007-42-7(CAS DataBase Reference)
Safety Information
  • Safety Statements 22-24/25
  • RIDADR UN 1789 8/PG 3
  • WGK Germany 3
  • 3-10
MSDS
L-Histidine hydrochloride Usage And Synthesis
  • Purification MethodsThe dihydrochloride crystallises from water or aqueous EtOH and is washed with acetone, then diethyl ether. Alternatively convert it to the histidine di-(3,4-dichlorobenzenesulfonate) salt by dissolving 3,4-dichlorobenzenesulfonic acid (1.5g/10mL) in the aqueous histidine solution with warming, and then the solution is cooled in ice. The resulting crystals (m 280o dec) can be recrystallised from 5% aqueous 3,4-dichlorobenzenesulfonic acid, then dried over CaCl2 under vacuum, and washed with diethyl ether to remove Purification of Biochemicals — Amino Acids and Peptides excess reagent. The dihydrochloride can be regenerated by passing the solution through a Dowex-1 (Cl-form) ion-exchange column. The solid is obtained by evaporation of the solution on a steam bath or better in a vacuum. [Greenstein & Winitz, The Amino Acids Vol 3 p 1976 1961, Beilstein 25/16 V 366.]
L-Histidine hydrochloride Preparation Products And Raw materials
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