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L-Cysteine hydrochloride anhydrous
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L-Cysteine Hydrochloride Anhydrous
(R)-2-Amino-3-mercaptopropionic acid monohydrochloride |
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C3H7NO2S·HCl:157.62 |
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CAS No.52-89-1 |
Nitrogen: 8.89% |
| L-Cysteine Hydrochloride Anhydrous, when dried, contains not less than
98.0 percent and not more than102.0 percent of L-Cysteine
Hydrochloride Anhydrous (C3H7NO2S·HCl). |
| Description: |
White crystals or crystalline powder; strongly acid taste. Very soluble
in water.
Solubility (H2O, g/100g):
about 102(20˚C) |
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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 |
+5.6˚to +8.9˚ |
|
State of solution
(Transmittance) |
Clear
and colorless
Not less than 98.0% |
| Heavy metals (Pb) |
Not more than 10PPm |
| Arsenic (As2O3) |
Not more than 1PPm |
| Other amino acids |
conforms
not detection |
| Loss on drying |
Not more than1.00% |
|
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 (2 year). |
