China Factory Direct
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| CAS number | 33239-19-9 |
| Product name | DIIODOFLUORESCEIN |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeMaterial GradeSpecialty GradeReagent Grade |
| Packaging | 25KG/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) |
Based on current marketvolatility and material availability.
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
| Industry | Application | Process |
|---|---|---|
| Medical Diagnostics | Fluorescent dyes for ophthalmic examinations (e.g., corneal injury detection) | Dissolved in saline or buffer solution and instilled into the eye; fluorescence is visualized under blue light illumination |
| Biomedical Research | Cell staining and tracer agent | Prepared as a solution at appropriate concentration for fluorescent labeling of live cells or tissue sections, followed by observation under a fluorescence microscope |
| Analytical Chemistry | pH indicator (color transition range approximately pH 4.0–6.0) | Dissolved in ethanol or aqueous solution and added to the sample; pH is determined based on color change |
| Materials Science | Fluorescent probe for sensor development | Immobilized on polymer matrices or nanomaterial surfaces to enable fluorescent response for detection of specific ions or molecules |
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantitative determination based on peak area comparison with reference standard using reversed-phase chromatography and UV detection at 490 nm. |
| Related Substances | HPLC-UV | Separation and quantification of impurities by retention time and response relative to main peak under validated gradient conditions. |
| Moisture Content | Karl Fischer Titration | Volumetric titration using iodine, sulfur dioxide, and pyridine in methanol to determine water content via stoichiometric reaction. |
| Residue on Ignition | Gravimetric Analysis | Measurement of non-volatile inorganic residue after high-temperature ashing at 550-600 C. |
| Heavy Metals | ICP-OES | Multi-element detection of Pb, Cd, Hg, As, and other regulated metals after acid digestion and plasma excitation. |
| Chloride Impurity | Ion Chromatography | Separation and quantification of chloride anion using suppressed conductivity detection after aqueous extraction. |
| Iodine Content | Potentiometric Titration with Sodium Thiosulfate | Redox titration of liberated iodine (from alkaline hydrolysis) using thiosulfate and starch endpoint detection. |
| pH of Aqueous Solution | pH Potentiometry | Measurement of hydrogen ion activity in a saturated aqueous suspension using calibrated glass electrode. |
| Solubility in Water | Visual Inspection and Filtration | Qualitative assessment of complete dissolution in specified volume of water at 25 C followed by filtration to detect insoluble matter. |
| Particle Size Distribution | Laser Diffraction | Analysis of scattered laser light intensity to determine volumetric particle size distribution in dispersed suspension. |
| Melting Point | Capillary Melting Point Apparatus | Determination of temperature range over which solid transitions to liquid phase under controlled heating rate. |
| Organic Volatile Impurities | GC-FID | Detection and quantification of residual solvents (e.g., acetone, methanol, DMF) using flame ionization detection after headspace sampling. |
| Test Item | Specification |
|---|---|
| Appearance | Red crystalline powder |
| Purity | >=98.5% |
| Water Content (KF) | <=0.5% |
| Melting Point | 278-282°C |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.1% |
| Solubility | Soluble in ethanol and aqueous alkali; slightly soluble in water |
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| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
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.