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High-purity, non-hygroscopic free base form optimized for pharmaceutical manufacturing.
Produced under strict GMP-compliant conditions with full traceability and batch documentation.
Exceptional chemical stability and consistent lot-to-lot performance.
Low endotoxin levels (<0.5 EU/mg) and stringent control of heavy metals (Pb < 5 ppm, As < 1 ppm).
Free from residual solvents and compliant with ICH Q3C guidelines.
Active pharmaceutical ingredient (API) in mucolytic formulations such as acetylcysteine prodrugs.
Redox buffer and thiol source in biopharmaceutical cell culture media and protein refolding processes.
Stabilizing agent in injectable and lyophilized dosage forms to prevent oxidation of sensitive APIs.
Key intermediate in the synthesis of glutathione, coenzyme A, and other sulfur-containing therapeutics.
| Chemical Type | L-Cysteine free base (C₃H₇NO₂S) |
| Product Form | White to off-white crystalline powder |
| Purity (HPLC) | ≥99.0% |
| Appearance | Free-flowing, odorless crystalline powder |
| pH (1% aqueous solution) | 5.0–6.5 |
| Loss on Drying | ≤0.5% |
| Sulfated Ash | ≤0.1% |
| Microbial Limits | Total aerobic count ≤100 CFU/g; absence of E. coli, Salmonella, and Staphylococcus aureus |
Contact With Us:
E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
