S-Benzyl-L-cysteine Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 3054-01-1 |
| Product name | S-Benzyl-L-cysteine |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeReagent Grade |
| Packaging | 25KG/bag500KG/bag1000KG/bag |
| Sample | Test Samples Available (Click to Request Samples) |
| COA | View COA |
| Price | Get Quote |
| Supply Type | Bulk / Contract manufacturing / OEM |
| Shipping | FCL / LCL available |
| Payment Terms | Support FOB \ CIF \ EXW quotations, and accept Letter of Credit (L/C). |
| Manufacturer | Greenrock Chemical(China Factory) |
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Documents We Provide for S-Benzyl-L-cysteine
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk S-Benzyl-L-cysteine Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of S-Benzyl-L-cysteine
| Industry | Application | Process |
|---|---|---|
| Pharmaceuticals | Intermediate in the synthesis of antibiotics (e.g., cephalosporins) | Organic synthesis: incorporation into the side chain of sulfur-containing β-lactam antibiotics |
| Pharmaceuticals | Chiral building block in drug discovery | Chiral synthesis: preparation of active pharmaceutical ingredients with defined stereochemistry |
| Biochemistry | Protective amino acid derivative in peptide synthesis | Protection of thiol groups with benzyl groups during solid-phase or solution-phase peptide synthesis to prevent oxidation or side reactions |
| Chemical Research | Cysteine derivative for enzymology or protein structural studies | Modeling of native cysteine residues to investigate protein folding or enzyme active sites |
Manufacturing Quality Control of S-Benzyl-L-cysteine
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantifies S-benzyl-L-cysteine by reversed-phase HPLC with UV detection at 210 nm, using a certified reference standard for calibration. |
| Enantiomeric Purity | Chiral HPLC | Resolves L- and D-enantiomers on a chiral stationary phase; peak area ratio determines enantiomeric excess. |
| Loss on Drying | Gravimetric (105 C, 2 h) | Measures mass loss after drying under controlled temperature and time to determine volatile content including residual solvents and water. |
| Residual Solvents | GC-FID | Quantifies common organic solvents (e.g., methanol, ethyl acetate) by gas chromatography with flame ionization detection using internal standard calibration. |
| Heavy Metals (as Pb) | ICP-OES | Determines total heavy metal content via inductively coupled plasma optical emission spectrometry after acid digestion. |
| Sulfur Content | Combustion IC | Oxidizes sample to sulfate, followed by ion chromatographic quantification of SO4(2-) anion. |
| Chloride Impurity | Ion Chromatography | Separates and quantifies chloride ions using suppressed conductivity detection after aqueous extraction. |
| pH (1% w/v aqueous solution) | Potentiometric Titration | Measures hydrogen ion activity with calibrated pH electrode in a standardized aqueous suspension. |
| Related Substances | HPLC-UV | Detects and quantifies structurally related impurities (e.g., L-cysteine, benzyl mercaptan, disulfides) using gradient HPLC-UV. |
| Specific Optical Rotation | Polarimetry | Measures rotation of plane-polarized light at 589 nm to confirm chiral integrity and concentration. |
| Water Content | Karl Fischer Titration | Determines trace water by coulometric or volumetric titration with iodine generated electrochemically or added reagent. |
| Microbial Limits | Membrane Filtration | Quantifies aerobic mesophilic microorganisms and detects specified pathogens (e.g., E. coli) per pharmacopeial guidelines. |
Technical Specifications of S-Benzyl-L-cysteine
| Test Item | Specification |
|---|---|
| Appearance | White to almost white crystalline powder |
| Purity | >=98.0% (LC-MS) |
| Water Content (KF) | <=0.5% |
| Melting Point | 178~182°C |
| Optical Rotation | +20.0 to +24.0° (c=1, 1M NaOH) |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=20 ppm |
Specifications vary by industry. Reach out to our technical experts for a COA tailored specifically to your application. Email:selse@GRchemical.com
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Download COA of S-Benzyl-L-cysteine
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of S-Benzyl-L-cysteine
Packaging of S-Benzyl-L-cysteine
Industrial S-Benzyl-L-cysteine Procurement FAQ
1. How do you ensure product quality consistency?
We rely on a mature China-based manufacturing system and implement strict batch control and quality inspection for every shipment. Our production process complies with ISO 9001 standards, and a COA is provided for each batch to ensure consistent and reliable quality.
2. Do you offer competitive pricing for bulk orders?
Yes, as a China-based manufacturer and bulk supplier, we provide tiered pricing based on order volume. We support FOB and CIF quotations, as well as L/C payment terms for large transactions to meet international trade requirements.
3. Can you support large-volume or long-term supply?
We have stable production capacity and a well-established supply chain, enabling continuous bulk supply. We support ton-level and container-level orders, as well as long-term cooperation projects.
4. What is your typical lead time?
For in-stock products, shipment can be arranged within 1–3 days. For bulk packaging or customized orders, lead time depends on the specific quantity and production schedule.
5. What documents do you provide?
We can provide complete documentation upon request, including COA, SDS, TDS, and other compliance certificates, meeting industrial procurement and export requirements.
6. Can you customize product specifications or packaging?
Yes, we support customization of parameters such as purity, impurities, residual solvents, and heavy metals. We also offer various bulk packaging options, including 25kg bags, drums, and IBC tanks, suitable for industrial applications and transportation.
7. What shipping options do you support?
We support both FCL (Full Container Load) and LCL (Less than Container Load) shipments, and can flexibly arrange logistics solutions based on order size to meet bulk chemical export needs.
8. Do you provide technical or application support?
Yes, we provide basic application guidance and technical support based on industry experience to help customers optimize product usage.
9. How do you handle compliance and export regulations?
We are familiar with international trade and export regulations, ensuring all products comply with relevant requirements. We also provide complete documentation to support smooth customs clearance and global delivery.
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