L-Cystine bis(t-butyl ester) dihydrochloride Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 38261-78-8 |
| Product name | L-Cystine bis(t-butyl ester) dihydrochloride |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeIndustrial GradeSpecialty 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 L-Cystine bis(t-butyl ester) dihydrochloride
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk L-Cystine bis(t-butyl ester) dihydrochloride Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of L-Cystine bis(t-butyl ester) dihydrochloride
| Industry | Application | Process |
|---|---|---|
| Pharmaceuticals | Intermediate in the synthesis of amino acid-based drugs | Reacted with tert-butanol to form the bis(tert-butyl ester) derivative, followed by hydrochloric acid treatment to yield the dihydrochloride salt |
| Biochemistry | Protective intermediate for peptide and protein synthesis | Used as a thiol-protecting group in peptide synthesis to prevent oxidation or side reactions |
| Chemical Synthesis | Precursor for sulfur-containing compounds | Employed in organic synthesis to introduce thiol functionality; active thiol groups are subsequently liberated via hydrolysis or reduction |
| Food Additives | Precursor for antioxidants in food processing | Applied in food manufacturing to control oxidative reactions and enhance product stability |
Manufacturing Quality Control of L-Cystine bis(t-butyl ester) dihydrochloride
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantitative determination using reverse-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 (e.g., mono-Boc derivative, free cystine, hydrolysis products) using gradient HPLC-UV. |
| Residual Solvents | GC-FID | Identification and quantification of residual solvents (e.g., DCM, methanol, toluene) by gas chromatography with flame ionization detection. |
| Water Content | Karl Fischer Titration | Volumetric or coulometric titration with iodine-based reagent to determine total water content based on stoichiometric reaction. |
| Heavy Metals | ICP-MS | Multi-element quantification of toxic metals (Pb, Cd, Hg, As) after acid digestion, using inductively coupled plasma mass spectrometry. |
| Chloride Content | Potentiometric Titration | Titration with silver nitrate using a silver indicator electrode to determine chloride ion concentration via precipitation reaction. |
| Optical Rotation | [alpha]D Measurement | Measurement of specific optical rotation using a polarimeter at 20 C and sodium D-line (589 nm) to confirm stereochemical integrity. |
| Residue on Ignition | Gravimetric Analysis | Weighing residue after high-temperature ashing (600-700 C) to assess inorganic impurities and sulfate ash. |
| pH of Aqueous Solution | pH Meter | Direct measurement of pH in a defined aqueous suspension (e.g., 1% w/v) using calibrated pH electrode. |
| Particle Size Distribution | Laser Diffraction | Analysis of dry powder particle size distribution using laser diffraction and Mie theory scattering models. |
| Microbial Limits | Membrane Filtration | Enumeration of aerobic mesophilic microorganisms and detection of specified pathogens (e.g., E. coli, S. aureus) per pharmacopeial methods. |
| Melting Point | Capillary Melting Point Apparatus | Determination of temperature range at which solid transitions to liquid, indicating purity and identity via thermal behavior. |
Technical Specifications of L-Cystine bis(t-butyl ester) dihydrochloride
| Test Item | Specification |
|---|---|
| Appearance | White crystalline solid |
| Purity | >=98.5% (by NMR) |
| Water Content (KF) | <=0.5% |
| Melting Point | 210-215°C (decomposes) |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Optical Rotation | -107.6 ± 5.0° (c=1, 6N HCl) |
| Residue on Ignition | <=0.2% |
| 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 L-Cystine bis(t-butyl ester) dihydrochloride
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of L-Cystine bis(t-butyl ester) dihydrochloride
Safety Information of L-Cystine bis(t-butyl ester) dihydrochloride
| Pictograms |  |
| Signal Word | Warning |
| Safety Data Sheet | |
Packaging of L-Cystine bis(t-butyl ester) dihydrochloride
Industrial L-Cystine bis(t-butyl ester) dihydrochloride 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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