L-Cysteine
City: Marupe
Please avoid sudden changes in temperature and humidity, as they may affect the condition of derivative ingredients and tablets.
The shelf life begins from the date of manufacture at the factory.
Taking into account logistical and transportation stages, the remaining shelf life of the product is always shorter than the full shelf life.
We ship products to our customers with a remaining shelf life of no less than 70%.
CERTIFICATE OF ANALYSIS
Product | L-Cysteine | Production Date | 2025.03.18 |
Lot Number | HACD25031802 | Expiration Date | 2027.03.17 |
Origin | Produced by Fermentation Cys | CAS | 52-90-4 |
Analysis Item | Specification | Method | Result |
Chemical & Physical Properties | |||
Characters, Appearance | White Crystals or crystalline powder | Visual | White Crystals |
Identification | Infrared absorption | USP43 | Conform |
Specific rotation[α]D20 | +8.3° to +9.5° | AJI TEST1 | +9.12° |
State of solution (Transmittance) | Clear and colorless≥98.0% | AJI TEST2 | 99.2% |
Chloride(Cl) | NMT 0.1% | AJI TEST3 | <0.1% |
Ammonium(NH4) | NMT 0.02>#/h1### | AJI TEST4 | <0.02% |
Sulfate(SO4) | NMT 0.028% | AJI TEST5 | <0.028% |
Iron(Fe) | NMT 10ppm | AJI TEST6 | <10ppm |
Lead | NMT 0.5ppm | USP43 | <0.5ppm |
Arsenic | NMT 0.5ppm | USP43 | <0.5ppm |
Cadmium | NMT 0.5ppm | USP43 | <0.5ppm |
Mercury | NMT 0.1ppm | USP43 | <0.1ppm |
Heavy metals(Pb) | NMT 10ppm | AJI TEST7 | <10ppm |
Other amino acids | Conforms | AJI TEST9 | Conform |
Loss on drying | NMT 0.5% | AJI TEST11 | 0.13% |
Residue on ignition (sulfated) | NMT 0.2% | AJI TEST13 | 0.14% |
Assay | NLT 98.0% and NMT 101.0% | AJI TEST16 | 99.82% |
pH | 4.5~ 5.5 | AJI TEST33 | 5.24 |
Micbiological Properties | |||
Total Aerobic Microbial Count | NMT 1000cfu/g | USP43 | <1000cfu/g |
Molds and Yeasts Count | NMT 100cfu/g | USP43 | <100cfu/g |
Coliform bacteria | Negative/10g | Testing Plate | Negative |
Salmonella sp. | Negative/10g | Testing Plate | Negative |
Staphylococcus aureus | Negative/10g | Testing Plate | Negative |
Shelf life | Recommend usage within 2 years from date of production. |