L-Alanyl-L-Cystine Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 115888-13-6 |
| Product name | L-Alanyl-L-Cystine |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeCosmetic GradeFood Grade |
| Packaging | 25KG/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 L-Alanyl-L-Cystine
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk L-Alanyl-L-Cystine Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of L-Alanyl-L-Cystine
| Industry | Application | Process |
|---|---|---|
| Pharmaceuticals | Used as a pharmaceutical intermediate for synthesizing bioactive peptides with antioxidant and cytoprotective properties | Serves as a key building block in solid-phase or solution-phase peptide synthesis |
| Cosmetics | Applied as an antioxidant and anti-aging active ingredient to support skin repair and brightening | Incorporated into skincare formulations—such as serums and creams—for transdermal delivery and activity |
| Biochemical Research | Employed in studies of sulfur-containing amino acid metabolism, redox regulation mechanisms, and peptide structure–function relationships | Used as a reference standard or substrate in enzymatic assays, mass spectrometry analysis, and cell culture experiments |
Manufacturing Quality Control of L-Alanyl-L-Cystine
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantitative determination using reversed-phase HPLC with UV detection at 210 nm, comparing peak area against a certified reference standard. |
| Related Substances | HPLC-UV | Separation and quantification of impurities using gradient HPLC-UV; identification based on retention time relative to reference standards or threshold limits. |
| Optical Rotation | [alpha]D | Measurement of specific optical rotation using a polarimeter at 20 C and sodium D-line (589 nm) to confirm chiral integrity and enantiomeric purity. |
| Loss on Drying | Gravimetric (105 C) | Weight loss after drying at 105 C for 2 hours, indicating volatile content including residual solvents and moisture. |
| Residual Solvents | GC-FID | Headspace gas chromatography with flame ionization detection to quantify common organic solvents (e.g., methanol, ethanol, acetone) against calibration standards. |
| Heavy Metals | ICP-MS | Multi-element quantification of toxic metals (Pb, Cd, As, Hg, Ni) by inductively coupled plasma mass spectrometry after acid digestion. |
| Chloride Content | Potentiometric Titration | Titration with silver nitrate using a silver indicator electrode to determine chloride ion concentration based on argentometric principle. |
| Sulfate Content | Gravimetric (BaSO4) | Precipitation of sulfate as barium sulfate followed by ignition and weighing to determine sulfate content. |
| pH (1% aqueous solution) | pH Meter | Electrochemical measurement of hydrogen ion activity in a 1% w/v aqueous solution at 25 C. |
| Water Content | Karl Fischer Titration | Volumetric or coulometric titration with iodine-based reagent to quantify total water content via stoichiometric reaction. |
| Microbial Limits | Membrane Filtration | Enumeration of aerobic mesophilic bacteria and detection of specified pathogens (e.g., E. coli, S. aureus) by membrane filtration and culture on selective media. |
| Particle Size Distribution | Laser Diffraction | Analysis of dry powder dispersion using laser light scattering to determine volume-based particle size distribution (D10, D50, D90). |
Technical Specifications of L-Alanyl-L-Cystine
| Test Item | Specification |
|---|---|
| Appearance | White to off-white crystalline powder |
| Purity | >=98.5% |
| Water Content (KF) | <=0.5% |
| Melting Point | 215-220°C (decomposes) |
| Optical Rotation | +6.0° to +8.0° (c=1, 1M HCl) |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Residue on Ignition | <=0.1% |
| Heavy Metals | <=10 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 L-Alanyl-L-Cystine
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
Packaging of L-Alanyl-L-Cystine
Industrial L-Alanyl-L-Cystine 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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