Introduction and application of CAS: 4998-57-6 | DL-Histidine
1H-Imidazole-4-alanine;D-Histidine/L-histidine,(1:1);rac-(R*)-2-Amino-3-(4-imidazolyl)propionic acid;DL-Histidine,98%;DL-Histdine;H-DL-His-OH (DL-Histidine;DL-Histidine 0;DL-Histidine
The production method uses L-histidine hydrochloride as raw material, adds acetic anhydride under alkaline conditions to carry out acylation reaction, extracts with ethanol and precipitates with excess acetone to obtain acetyl DL-histidine acid; add acetyl-DL-histidine acid in hydrochloric acid Reflux for several hours, ethanol precipitate to obtain crude DL-histidine acid, which is then purified by crystallization to obtain pure product.
Specification of CAS: 4998-57-6 | DL-Histidine
|
ITEMS |
SPECIFICATION |
|
CAS |
4998-57-6 |
| MF | C6H9N3O2 |
|
MW |
155.15 |
| Boiling Point | 278.95°C (rough estimate) |
|
Appearance |
White to Almost white powder to crystal |
|
Purity |
99% |
| Density | 1.3092 (rough estimate) |
|
Storage condition |
2-8°C |
| Production | China |
Package and transportation of CAS: 4998-57-6 | DL-Histidine
Package:1g, 10g, 25g 1kg
Transportation: by courier/ by air/ by sea
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