Procysteine Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 19771-63-2 |
| Product name | Procysteine |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical 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) |
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Documents We Provide for Procysteine
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Procysteine Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Procysteine
| Industry | Application | Process |
|---|---|---|
| Food Industry | Nutritional Supplement | Added to food products as a nutritional fortificant to enhance nutritional value. |
| Pharmaceutical Industry | Active Pharmaceutical Ingredient (API) Intermediate | Used in the synthesis of biologically active drug molecules, such as antioxidants. |
| Personal Care | Skincare Formulation Ingredient | Incorporated into skincare formulations to leverage its antioxidant properties for protection against free radical–induced skin damage. |
| Research | Biochemical Research | Applied in laboratory studies of protein structure and function, as well as enzyme activity modulation experiments. |
Manufacturing Quality Control of Procysteine
| Test Item | Common Testing Methods | Method Overview |
|---|---|---|
| Assay | High-Performance Liquid Chromatography (HPLC) | Uses a C18 column with UV detection (210–280 nm) or fluorescence detection (after derivatization). Mobile phase is typically a gradient of phosphate buffer and methanol. Quantification is performed by external standard method. Offers high accuracy and is suitable for determining L-cysteine content in both raw materials and formulations. |
| Assay | Titration (Redox Titration) | Leverages the reducing property of L-cysteine, titrated with iodine standard solution using starch as indicator. The endpoint is indicated by the appearance of blue color. Suitable for rapid, approximate determination, but susceptible to interference from other reducing substances. |
| Assay | Amino Acid Analyzer | Employs ion-exchange chromatography combined with ninhydrin derivatization, followed by UV or fluorescence detection. Enables simultaneous quantification of multiple amino acids and is ideal for accurate determination of L-cysteine in complex samples. |
| Purity and Impurity Testing | High-Performance Liquid Chromatography (HPLC) | Separates L-cysteine and its related impurities (e.g., cystine, oxidized cysteine derivatives, deaminated products) via gradient elution. Purity is assessed by calculating the percentage of the main peak area, ensuring compliance with pharmacopeial limits for impurities. |
| Sulfur Content Determination | Oxygen Bomb Combustion - Ion Chromatography | Sample is combusted in an oxygen bomb to convert sulfur into sulfate (SO₄²⁻), which is absorbed in water and analyzed by ion chromatography. Sulfur content is calculated indirectly, verifying whether the sulfur element in the molecule matches the theoretical value. |
| Isomer Testing | Chiral High-Performance Liquid Chromatography (Chiral HPLC) | Uses chiral stationary phases (e.g., cyclodextrins, cellulose derivatives) to separate L- and D-cysteine enantiomers. Ensures absence of racemization and meets pharmaceutical-grade optical purity requirements (typically ≥98.5% L-form). |
| Moisture Content | Karl Fischer Titration | Quantifies trace moisture based on the reaction of iodine, sulfur dioxide, pyridine, and methanol. Used to control the drying level of raw material and prevent oxidative degradation. |
| Residue on Ignition & Heavy Metals | Loss on Ignition / Atomic Absorption Spectroscopy (AAS) | Residue on ignition is determined by weighing the residue after high-temperature ashing. Heavy metals (e.g., lead, arsenic, cadmium) are measured by AAS or ICP-MS, ensuring compliance with pharmacopeial limits (e.g., ≤10 ppm). |
| pH Value | Potentiometry (pH Meter) | Prepare a solution of specified concentration (e.g., 5%) and measure pH using a calibrated pH meter. Controls acidity/alkalinity to ensure stability (aqueous solutions of L-cysteine typically have a pH between 2.0 and 3.5). |
| Solution Clarity and Color | Visible Spectrophotometry / Visual Comparison | Prepare a solution of specified concentration and measure absorbance at a defined wavelength (e.g., 420 nm), or compare visually with standard color solutions. Ensures absence of turbidity or abnormal coloration, indicating oxidation or impurity contamination. |
| Microbial Limits | Plate Count Method / MPN Method | Tests for total aerobic microbial count, molds and yeasts, and presence of Escherichia coli according to pharmacopeial requirements. Ensures sterility or compliance with microbial standards for non-sterile preparations. |
Technical Specifications of Procysteine
| Test Item | Specification |
|---|---|
| Appearance | White solid |
| Purity | >=98.0% (HPLC) |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Optical Rotation | -66.0 to -61.0 deg (c=1, H2O) |
| Melting Point | 200 to 204 °C |
| 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 Procysteine
| CAS/Product ID | *Required fields | |
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NMR Spectra of Procysteine
Packaging of Procysteine
Industrial Procysteine 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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