|
L-Cysteine Hydrochloride Monohydrate
|
|
L-Cysteine Hydrochloride Monohydrate
(R)-2-Amino-3-mercaptopropionic acid monohydrochloride
monohydrate |
 |
|
C3H7NO2S·HCl·H2O:175.64 |
|
CAS No.7048-04-6 |
Nitrogen: 7.97% |
| L-Cysteine Hydrochloride Monohydrate, when dried, contains not less than
98.5 percent and not more than101.0 percent of L-Cysteine
Hydrochloride(C3H7NO2S·HCl·H2O). |
| Description: |
White crystals or crystalline powder; strongly acid taste. Very soluble
in water.
Solubility (H2O, g/100g):
about 110(20˚C) |
|
Identification:
|
Compare the infrared absorption spectrum of the sample with that of the
standard by potassium bromide disc method.
|
| Specifications: |
| Item |
Limit |
| Specific rotation [α]
20D |
+6.1˚to +7.8˚ |
|
State of solution
(Transmittance) |
Clear
and colorless
Not less than 98.0% |
| Chloride (Cl) |
19.89 to 20.29% |
| Ammonium (NH4) |
Not more than 0.02% |
| Sulfate (SO4) |
Not more than 0.020% |
| Iron (Fe |
Not more than 10PPm |
| Heavy metals (Pb) |
Not more than 10PPm |
| Arsenic (As2O3) |
Not more than 1PPm |
| Other amino acids |
Chromatographically
not detection |
| Loss on drying |
8.50 to 12.00% |
|
Residue on ignition
(Sulfated) |
Not more than 0.10% |
| Assay |
98.5 to 101.0% |
| PH |
1.5 to 2.0 |
☆☆☆
Recommended storage limit and condition: Preserved in tight
containers at controlled room temperature (1 year). |
