S-Phenyl-L-cysteine Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 34317-61-8 |
| Product name | S-Phenyl-L-cysteine |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeCosmetic GradeFood 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-Phenyl-L-cysteine
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk S-Phenyl-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-Phenyl-L-cysteine
| Industry | Application | Process |
|---|---|---|
| Pharmaceuticals | Used as a pharmaceutical intermediate for synthesizing sulfur-containing amino acid derivatives or antioxidants | Synthesized via S-phenylation of L-cysteine, typically by reacting L-cysteine with aryl halides under basic conditions |
| Biochemistry | Employed in studies of thiol metabolism pathways and mechanisms of cysteine residue modification in proteins | Applied as a reference standard or probe molecule in in vitro enzymatic assays or cellular experiments to monitor thiol group reactivity |
| Cosmetics | Used as a precursor to skin protectants or antioxidant ingredients | Synthesized under mild conditions and incorporated into stable skincare formulations, where it is metabolized to glutathione analogues to exert antioxidant effects |
Manufacturing Quality Control of S-Phenyl-L-cysteine
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantification using reversed-phase HPLC with UV detection at 205–210 nm, comparing peak area against a certified reference standard. |
| Enantiomeric Purity | Chiral HPLC | Separation on a chiral stationary phase (e.g., Chirobiotic T or Crownpak CR(+) column) with UV detection to determine L-enantiomer excess. |
| Loss on Drying (LOD) | Gravimetric Thermogravimetry | Mass loss measured after drying at 105 °C under vacuum or nitrogen until constant weight is achieved. |
| Residual Solvents | GC-FID | Identification and quantification of common solvents (e.g., methanol, ethanol, ethyl acetate) using headspace GC with flame ionization detection. |
| Heavy Metals (as Pb) | ICP-MS | Multi-element quantification of toxic metals (Pb, Cd, Hg, As) after acid digestion, using isotopic dilution or external calibration. |
| Chloride Impurity | Ion Chromatography (IC) | Separation and conductivity detection of chloride anions in aqueous solution after sample dissolution and filtration. |
| Sulfate Impurity | IC or Turbidimetry | Quantification via ion chromatography with suppressed conductivity detection or barium sulfate turbidimetric assay. |
| pH (1% w/v aqueous solution) | Potentiometric pH Measurement | Direct measurement using calibrated pH electrode in a standardized aqueous suspension/solution. |
| Specific Optical Rotation | [α]D | Measurement of plane-polarized light rotation at 589 nm (Na D-line) in aqueous or HCl solution, confirming chiral integrity and concentration. |
| Related Substances | HPLC-UV (Forced Degradation Study) | Detection and quantification of structurally related impurities (e.g., disulfides, oxidation/degradation products) using gradient HPLC-UV. |
| Microbial Contamination | Membrane Filtration & Plate Count | Enumeration of aerobic microorganisms and absence of specified pathogens (e.g., E. coli, Salmonella) per USP <61>/<62>. |
Technical Specifications of S-Phenyl-L-cysteine
| Test Item | Specification |
|---|---|
| Appearance | White solid |
| Purity | >=98.0% (HPLC) |
| Water Content (KF) | <=0.5% |
| Melting Point | 215-220 °C |
| Optical Rotation | +65.0 to +70.0 ° (c=1, in 1M HCl) |
| 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-Phenyl-L-cysteine
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of S-Phenyl-L-cysteine
Packaging of S-Phenyl-L-cysteine
Industrial S-Phenyl-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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