L-Cysteine
CAS: 52-90-4
Category: Amino Acids
| Purity | Food Grade (FCC ≥98.5%), Pharmaceutical Grade (USP), Reagent Grade (≥99%). |
| Molecular Formula | C3H7NO2S |
| Molecular Weight | 121.16 |
| Appearance | White crystalline or crystalline powder |
| Packaging | 25 kg/fiber drum with PE liner, 5 kg/aluminum foil bag. |
| Testing Indicators | Appearance — Visual inspection; Specific rotation — Polarimetry; Identification — IR, Amino acid analysis; Purity — HPLC; Heavy metals — ICP-MS; Loss on drying — Gravimetry; Microbial limits — Membrane filtration; Chloride — Argentometric titration; Residue on ignition — Muffle furnace. |
| Storage Notes | Stored in a cool, dry place at room temperature in a tightly closed container under inert gas, away from light, air, and strong oxidizers to prevent oxidation. |
| Lead Time | days |
Used as a thiol-containing amino acid intermediate in the synthesis of nutritional supplements, mucolytics, and protein structure stabilizers.