A4722812
DL-Histidine , 98% , 4998-57-6
Synonym(s):
(S)-2-Amino-3-(4-imidazolyl)propionic acid;(±)-2-Amino-3-(4-imidazolyl)propionic acid;L -Histidine;NSC 137773
CAS NO.：4998-57-6
Empirical Formula: C6H9N3O2
Molecular Weight: 155.15
MDL number: MFCD00005208
EINECS: 225-660-9
| Pack Size | Price | Stock | Quantity |
| 1G | RMB23.20 | In Stock |
|
| 5G | RMB62.40 | In Stock |
|
| 25G | RMB156.80 | In Stock |
|
| 100g | RMB554.40 | In Stock |
|
| others | Enquire |
Update time: 2022-07-08
PRODUCT Properties
| Melting point: | 273 °C (dec.)(lit.) |
| Boiling point: | 278.95°C (rough estimate) |
| Density | 1.3092 (rough estimate) |
| refractive index | 1.6500 (estimate) |
| storage temp. | Keep in dark place,Inert atmosphere,Room temperature |
| solubility | 0.5 M HCl: soluble |
| pka | 1.8(at 25℃) |
| form | powder to crystal |
| color | White to Almost white |
| Merck | 14,4720 |
| BRN | 7800 |
| CAS DataBase Reference | 4998-57-6(CAS DataBase Reference) |
| EPA Substance Registry System | Histidine (4998-57-6) |
Description and Uses
DL-Histidine has been used to study the fouling behaviour of polyethersulfone ultrafiltration membranes made with different PVP (polyvinylpyrrolidone).
Safety
| Symbol(GHS) |  GHS07 |
| Signal word | Warning |
| Hazard statements | H315-H319-H335 |
| Precautionary statements | P261-P305+P351+P338 |
| Hazard Codes | Xn |
| Risk Statements | 22-36/37/38 |
| Safety Statements | 22-24/25-36/37-26 |
| WGK Germany | 3 |
| HS Code | 29339900 |
