L-Histidine CAS NO.71-00-1

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Abbreviation: L-His   
CAS Number: 71-00-1   
Conforms To: USP, EP   
Chemical Name: (S)-2-Amino -1H-imidazole-4 -propionic Acid   
Chemical Formula: C6H9N3O2   
Molecular Weight: 155.15   
Nitrogen Content: 0.2708   
Assay: 98.5 to 101.0%   
Solubility: Soluble in water   
Property: White crystals or crystalline powder; slightly bitter taste  

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 by the body, 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.