L-Histidine China manufacture CAS NO.71-00-1

Product Name:L-HISTIDINE

Synonym:FEMA3694;Histidin;L-Histidine;L-Histdine;H-L-HIS-OH;L-Hisidine;HISTIDINE;d,l-histidine;H-HIS-OH;HIS;L-HIS;

CAS No.:71-00-1

Molecular formula:C6H9N3O2

Molecular weight:155.15500

Appearance:White crystals or crystalline powder

Identification:Meets the requirements

Specific rotation[α]D25:+12.6°～+14.0°

Ph：7.0～8.5

Loss on drying：≤0.2%

Residue on ignition：≤0.4%

Chloride(Cl):≤0.05%

Iron(Fe):≤0.003%

Heavy metals(Pb) :≤0.0015%

Chromatographic purity: Not more than 0.5% of any individual impurity is found； Not more than 2.0% of total impurities is found.

Assay:98.5%～101.5%

Description:Histidine (abbreviated as His or H; encoded by the codons CAU and CAC) is an α-amino acid that is used in the biosynthesis of proteins. It contains an α-amino group (which is in the protonated –NH3+ form under biological conditions), a carboxylic acid group (which is in the deprotonated –COO− form under biological conditions), and a side chain imidazole, classifying it as a positively charged amino acid at physiological pH. Initially thought essential only for infants, longer-term studies have shown it is essential for adults also.

Histidine was first isolated by German physician Albrecht Kossel and Sven Hedin in 1896. It is also a precursor to histamine, a vital inflammatory agent in immune responses. The acyl radical is histidyl.

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