L-CYSTINE DIHYDROCHLORIDE Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 30925-07-6 |
| Product name | L-CYSTINE DIHYDROCHLORIDE |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeFood GradeCosmetic 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 DIHYDROCHLORIDE
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk L-CYSTINE 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 DIHYDROCHLORIDE
| Industry | Application | Process |
|---|---|---|
| Pharmaceuticals | Pharmaceutical raw material | Used in the synthesis of drug intermediates, such as antioxidants and precursors for protein synthesis |
| Food | Nutritional supplement | Added to food products as an amino acid supplement to enhance nutritional value |
| Personal care | Ingredient in skincare products | Applied in skincare formulations as a humectant and skin-repairing agent |
| Biotechnology | Laboratory reagent | Supplied as an amino acid source in cell culture and biochemical research |
| Animal nutrition | Animal feed additive | Supplemented in animal feed as an amino acid to support growth and development |
Manufacturing Quality Control of L-CYSTINE DIHYDROCHLORIDE
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (L-Cystine HCl content) | Acid-Base Titration | Quantifies active ingredient by titration with standardized NaOH using phenolphthalein indicator; based on stoichiometric neutralization of hydrochloric acid moiety. |
| Loss on Drying | Gravimetric (Thermogravimetric) | Measures mass loss after drying at 105 C for 2 hours; reflects volatile impurities and residual moisture. |
| Residue on Ignition | Gravimetric (Sulfated Ash) | Determines inorganic residue after high-temperature ignition; indicates non-volatile inorganic contaminants. |
| Heavy Metals (Pb, Cd, Hg, As) | ICP-OES | Simultaneous multi-element quantification after acid digestion using plasma excitation and optical emission detection. |
| Chloride Content | Argentometric Titration (Mohr method) | Titration with standardized AgNO3 solution using K2CrO4 indicator; forms AgCl precipitate at endpoint. |
| Specific Optical Rotation | Polarimetry | Measures rotation of plane-polarized light by chiral L-cystine HCl in solution; confirms enantiomeric purity and identity. |
| pH (1% aqueous solution) | Potentiometric (pH meter) | Determines hydrogen ion activity using calibrated glass electrode; reflects acidic nature due to HCl salt form. |
| Related Substances (Impurity Profile) | HPLC-UV | Separates and quantifies structurally related compounds (e.g., cysteine, cystine disulfide variants) using reversed-phase chromatography and UV detection at 210 nm. |
| Sulfate | Gravimetric (Barium Sulfate Precipitation) | Precipitates sulfate as BaSO4 after acidification and barium chloride addition; measures insoluble residue. |
| Iron (Fe) | AAS | Quantifies iron content by atomic absorption of ground-state Fe atoms in acetylene-air flame. |
| Microbial Limits | Membrane Filtration / Plate Count | Determines total aerobic microbial count and absence of specified pathogens (E. coli, Salmonella) via culture-based enumeration. |
| Particle Size Distribution | Laser Diffraction | Measures volume-weighted particle size distribution by analyzing angular scattering pattern of laser beam passing through dispersed sample. |
Technical Specifications of L-CYSTINE DIHYDROCHLORIDE
| Test Item | Specification |
|---|---|
| Appearance | Off-white crystalline solid |
| Purity | >=98.0% |
| Water Content (KF) | <=0.5% |
| Melting Point | 210-215°C (decomposes) |
| Optical Rotation | -163 to -173° (c=1, 1M HCl) |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.1% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
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 DIHYDROCHLORIDE
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of L-CYSTINE DIHYDROCHLORIDE
Packaging of L-CYSTINE DIHYDROCHLORIDE
Industrial L-CYSTINE 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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