L-Cysteine
HCL Mono
Chemical
Name: L-Cysteine hydrochloride monoh
ydrate
Molecular Formula: C3H7NO2S.HCl.H2O
Molecular Weight: 175.64
Cas No: [7048-04-6]
Characteristics: White crystals or crystalline powder;
strongly acid taste.
Quality Standards: USP28, AJI92.
Descripton
| Item | Specifications | |
| USP28 | AJI92 | |
| Appearance | White crystals or crystalline powder; strongly acid taste. | |
| Identification | Infrared Absorption | --- |
| Specific optical rotation | +5.6 °- +8.9 ° | +5.5 °- +7.0 ° |
| State of solution (Transmittance) | --- | ≥ 98.0% clear and colorless |
| Chloride (Cl) | --- | 19.89-20.29% |
| Ammonium(NH4) | --- | ≤ 0. 002% |
| Sulfate | ≤ 0. 03 % | ≤ 0. 020% |
| Iron | ≤ 0. 003 % | 10ppm |
| Heavy Metals (as Pb), | ≤ 0.00 15% | ≤ 10ppm |
| Arsenic (as As), | --- | ≤ 1ppm |
| Other amino acids | --- | Not detected |
| Organic volatile impurities | Meets the requirement | --- |
| Loss on drying, | 8-12 % | 8.5-12 % |
| Residue on ignition, | c | ≤ 0.1 0 % |
| Assay | 98.5-101.5 % | 9 9.0-10 0.5 % |
| pH value | --- | 1.5-2.0 |
| Organic volatile impurities | Meets the requirement | --- |
| Chromatographic purity | 0.5% max Individual impurity, 2% max total | --- |
Packaging and Storage: In 25kgs
fiber drum double polyethylene bags inside; Preserve in
well-closed containers, at controlled room temperature.
Recommended limit:1 year.
