L-Histidine hydrochloride
L-Histidine hydrochloride Basic information
- Product Name:
- L-Histidine hydrochloride
- Synonyms:
-
- H-His-OH.xHCl
- L-HISTIDINE DIHYDROCHLORIDE
- Crystalline2HCl
- L-Histidine hydrochloride
- L-Histidine hydrochloride solution
- histidine hydrochloride
- China Best L-Histidine hydrochloride CAS NO.1007-42-7
- L-Histidine hydrochloride CAS NO.1007-42-7
- CAS:
- 1007-42-7
- MF:
- C6H10ClN3O2
- MW:
- 191.62
- EINECS:
- 213-754-2
- Mol File:
- 1007-42-7.mol
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 Reference
- 1007-42-7(CAS DataBase Reference)
MSDS
- Language:English Provider:SigmaAldrich
L-Histidine hydrochloride Usage And Synthesis
Purification Methods
The 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.]
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