Pseudothiohydantoin Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 556-90-1 |
| Product name | Pseudothiohydantoin |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Industrial 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 Pseudothiohydantoin
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Pseudothiohydantoin Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Pseudothiohydantoin
| Industry | Application | Process |
|---|---|---|
| Pharmaceuticals | Intermediate for synthesizing antiepileptic drugs, such as phenytoin sodium | Produced by reacting thiohydantoin with sulfur or a sulfiding agent under heating; serves as a key intermediate in thio-modification of cyclic structures |
Manufacturing Quality Control of Pseudothiohydantoin
| 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. |
| Moisture Content | Karl Fischer Titration | Volumetric or coulometric titration based on the stoichiometric reaction of water with iodine and sulfur dioxide in pyridine/methanol medium. |
| Residue on Ignition | Gravimetric Analysis | Measurement of non-volatile inorganic residue after high-temperature ashing (500-600 C) followed by weighing. |
| Heavy Metals (as Pb) | AAS (Flame or Graphite Furnace) | Atomic absorption spectroscopy quantifies lead and other heavy metals after acid digestion and matrix matching. |
| Chloride Impurity | Potentiometric Titration | Titration with silver nitrate using a silver indicator electrode to detect endpoint based on AgCl precipitation. |
| Sulfate Impurity | Barium Sulfate Gravimetry | Precipitation of sulfate as BaSO4 under controlled pH and temperature, followed by filtration, drying, and weighing. |
| Melting Point | Capillary Melting Point Apparatus | Determination of solid-to-liquid transition temperature using calibrated capillary tube method per USP/EP guidelines. |
| Appearance | Visual Inspection | Assessment of physical state, color, and clarity against established reference standards under controlled lighting conditions. |
| Solubility in Water | Qualitative Dissolution Test | Evaluation of complete dissolution in specified volume of water at defined temperature and agitation time. |
| Related Substances | HPLC-DAD | Separation and detection of structurally similar impurities using gradient HPLC with diode-array detection and relative response factors. |
| Loss on Drying | Thermogravimetric Analysis (TGA) or Oven Drying | Measurement of mass loss upon heating at 105 C for 2 hours under forced-air conditions to determine volatile content. |
| pH of Aqueous Solution | pH Meter Measurement | Direct potentiometric measurement of pH in a 1% w/v aqueous suspension using calibrated pH meter and temperature compensation. |
Technical Specifications of Pseudothiohydantoin
| Test Item | Specification |
|---|---|
| Appearance | Yellow solid |
| Purity | >=98.0% |
| Water Content (KF) | <=0.5% |
| Melting Point | 215-219°C |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=10 ppm |
| Residue on Ignition | <=0.1% |
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 Pseudothiohydantoin
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| Lot/Batch Number | *Required fields | |
NMR Spectra of Pseudothiohydantoin
Packaging of Pseudothiohydantoin
Industrial Pseudothiohydantoin 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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