L-CYSTEIC ACID Bulk Supply for Industrial Use
China Factory Direct
 |
|
| CAS number | 498-40-8 |
| Product name | L-CYSTEIC ACID |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Agricultural GradeReagent 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) |
QUOTE TYPE
PACKAGING TYPE
TOTAL QUANTITY(KG)
PREFERRED SHIPPING METHOD
YOUR COMPANY
YOUR E-MAIL
Calculate Summary
Based on current marketvolatility and material availability.
Documents We Provide for L-CYSTEIC ACID
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk L-CYSTEIC ACID Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of L-CYSTEIC ACID
| Industry | Application | Process |
|---|---|---|
| Pharmaceuticals | Intermediate for synthesizing amino acid–based drugs | Produced via sulfonation of alanine with a sulfonating agent (e.g., chlorosulfonic acid) |
| Cosmetics | Used as a mild surfactant ingredient | Applied in aqueous solutions—pH-adjusted and formulated in combination with other surfactants |
| Agriculture | Used in the preparation of slow-release plant nutrients | Forms chelates with metal ions (e.g., magnesium, calcium) to enhance nutrient uptake efficiency |
| Laboratory | Used as a buffering component in biochemical research | Employed to prepare buffer solutions with stable pH in the range of 6.5–7.5 |
Manufacturing Quality Control of L-CYSTEIC ACID
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | Acid-Base Titration | Quantifies sulfonic acid and amino groups via dual-step titration with standardized NaOH and HCl solutions. |
| Moisture Content | Karl Fischer Titration | Measures water content by electrochemical reaction between iodine, sulfur dioxide, and water in methanol/pyridine medium. |
| Heavy Metals (as Pb) | Atomic Absorption Spectroscopy (AAS) | Determines trace metal impurities by measuring absorption of specific wavelengths of light by ground-state atoms in flame or graphite furnace. |
| Sulfate Impurity | Ion Chromatography (IC) | Separates and quantifies sulfate anions based on differential migration through an ion-exchange column with conductivity detection. |
| Chloride Impurity | Potentiometric Titration with AgNO3 | Detects chloride ions via precipitation titration using silver nitrate and a silver indicator electrode. |
| pH (1% aqueous solution) | pH Meter Measurement | Measures hydrogen ion activity in aqueous solution using calibrated glass and reference electrodes. |
| Specific Optical Rotation | Polarimetry | Determines enantiomeric purity by measuring the angle of rotation of plane-polarized light passing through a solution. |
| Residue on Ignition | Gravimetric Analysis | Quantifies non-volatile inorganic impurities by weighing residue remaining after high-temperature ashing. |
| Iron (Fe) Content | ICP-OES | Measures iron concentration by detecting characteristic atomic emission lines after plasma atomization and excitation. |
| Loss on Drying | Thermogravimetric Analysis (TGA) | Determines volatile content by measuring mass loss upon controlled heating under inert atmosphere. |
| Related Substances | Reverse-Phase HPLC | Separates and quantifies structurally similar impurities using C18 column, UV detection, and gradient elution. |
| Microbial Limits | Membrane Filtration and Plate Count | Detects viable aerobic microorganisms by filtration, membrane transfer to nutrient agar, and colony enumeration. |
Technical Specifications of L-CYSTEIC ACID
| Test Item | Specification |
|---|---|
| Appearance | White to almost white crystalline powder |
| Purity | >=98.0% (HPLC) |
| Water Content (KF) | <=0.5% |
| Melting Point | 210-215°C (decomposes) |
| Optical Rotation | +7.6 to +8.4° (c=1, H2O) |
| Total Impurities | <=2.0% (HPLC) |
| Single Impurity | <=0.5% (HPLC) |
Specifications vary by industry. Reach out to our technical experts for a COA tailored specifically to your application. Email:selse@GRchemical.com
|
|
Download COA of L-CYSTEIC ACID
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of L-CYSTEIC ACID
Packaging of L-CYSTEIC ACID
Industrial L-CYSTEIC ACID 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.
Use Bulk
Supply Factory
Direct ISO 9001
Certified Samples
Available Stable
Supply