L-Histidine, also known as 2-Amino-3-(1H-imidazol-4-yl)propanoic acid, is an essential amino acid with an imidazole functional group. It is a precursor for carnosine biosynthesis and histamine.
Characters | Unit | Specification |
---|---|---|
Identity A, B, C, D | Correlates to test | |
Appearance of solution | Correlates to test | |
Ninhydrin-positive substances | Correlates to test | |
Specific optical rotation (USP) | o | 11.4 - 12.4 |
Heavy Metals (as Pb) | % | ≤ 0.0010 |
Chlorides | % | ≤ 0.0200 |
Sulphates | % | ≤ 0.0300 |
Ammonium | % | ≤ 0.02 |
Iron | % | ≤ 0.0010 |
Loss on drying | % | ≤ 0.5 |
Sulphated ash | % | ≤ 0.1 |
Assay | % | 98.5 - 101.0 |
Shelf Life/Retest Date: L-Histidine can be kept for at least 2 years if stored in a cool and dry place under recommended conditions.
Storage/Shipping Conditions:
Pack Sizes: 5 Kg