L-Cysteine
HCL Anhy 
Chemical
Name: L-Cysteine hydrochloride hydrate
Molecular Formula: C3H7NO2S.HCl
Molecular Weight: 157.6147
Cas No: [52-89-1]
Characteristics: White crystals or crystalline powder;
strongly acid taste.
Quality Standards: USP28, AJI92.
| Item | Specifications | ||
| USP28 | AJI92 | ||
| Appearance | White
crystals or crystalline powder; strongly acid taste. |
||
| Identification | Infrared Absorption | - - - | |
| Specific optical rotation | +5.6 °- +8.9 ° | +5.6 °- +8.9 ° | |
| State of solution (Transmittance ) |
- - - | ≥
98.0% clear and colorless |
|
| Sulfate | ≤ 0. 03 % | - - - | |
| Iron | ≤ 0. 003 % | - - - | |
| 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, | ≤ 1 % | ≤ 1 % | |
| Residue on ignition, | c | ≤ 0.1% | |
| Assay | 98.5-101.5 % | 9 8 .0-10 2 % | |
| 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 f iber drum double polyethylene bags inside; Preserve in well-
closed containers, at controlled room temperature.
Recommended limit: 2 year.
