L-Histidine HCl

About L-Histidine HCl

L-histidine is one of the 10 essential amino acids for infants. Most lists of amino acids classify L-histidine as an essential amino acid; however, it has never been clear if L-histidine is an essential amino acid for adults. Even though L-histidine is synthesized adult human tissues, sufficient quantities may not be made to meet the physiological requirements imposed by certain stress or disease situations.


L-histidine plays a key role in production of red and white blood cells. It has been reported that rheumatoid arthritis sufferers have abnormally low blood levels of L-histidine. A pilot clinical study with RA patients show mixed results but still enough to warrant further research.


L-Histidine monohydrochloride monohydrate is manufactured by neutralizing L-histidine with hydrochloric acid. L-Histidine HCl is manufactured under cGMP conditions. No materials of animal origin are used in the production of Histidine HCl or in any Ajinomoto amino acid.

L HistidineHCLH2O

Abbreviation: L-His HCl H2O
CAS Number: 5934-29-2
Conforms To: EP
Chemical Name: (2)-2-Amino -1H-imidazole-4 -propionic Acid Monohydrochloride Monohydrate
Chemical Formula: C6H9N3O2·HCl·H2O
Molecular Weight: 209.6300
Nitrogen Content: 0.2004
Assay: 98.5 to 101.0%
Solubility: Freely soluble in water
Description: White crystals or crystalline powder; slightly acid and bitter taste

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