EOSIN Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 17372-87-1 |
| Product name | EOSIN |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeReagent 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 EOSIN
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk EOSIN Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of EOSIN
| Industry | Application | Process |
|---|---|---|
| Biomedical | Tissue stain for microscopic examination of cells and tissues in pathology | Dissolved in alcohol or aqueous solution; used in combination with hematoxylin and other dyes for staining paraffin-embedded sections |
| Clinical Diagnostics | Supporting stain reagent in clinical pathology testing | Applied after tissue fixation, followed by staining, dehydration, clearing, and mounting |
| Education & Research | Staining material for biology and medical teaching laboratories in universities and research institutions | Used to visualize cellular structures—including erythrocytes and muscle fibers—under the microscope |
| Environmental Monitoring | Indicator dye in select biological sample analyses (limited application) | Employed as a fluorescent label or visualization aid for microbial or cellular morphology analysis |
Manufacturing Quality Control of EOSIN
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | UV-Vis Spectrophotometry | Measures absorbance at characteristic wavelength (e.g., 517 nm) and calculates concentration using Beer-Lambert law and certified reference standard. |
| Loss on Drying | Gravimetric Analysis (Thermogravimetry) | Determines volatile content by measuring mass loss after drying at 105 C for 2 h under controlled conditions. |
| Heavy Metals (as Pb) | Atomic Absorption Spectroscopy (AAS) | Quantifies total heavy metals after wet digestion by measuring absorption of ground-state atoms in flame or graphite furnace. |
| Chloride Impurity | Potentiometric Titration with AgNO3 | Detects chloride ions via precipitation titration using silver nitrate and silver indicator electrode. |
| Sulfate Impurity | Gravimetric Analysis (Barium Sulfate Precipitation) | Precipitates sulfate as BaSO4, filters, dries, and weighs to determine sulfate content. |
| pH of 1% Aqueous Solution | pH Potentiometry | Measures hydrogen ion activity in a standardized aqueous solution using calibrated pH electrode. |
| Water Solubility | Visual Dissolution Test | Evaluates complete dissolution in distilled water at specified temperature and concentration per USP/EP monographs. |
| Residue on Ignition | Gravimetric Analysis (Ignition at 600 C) | Determines non-volatile inorganic impurities by weighing residue after high-temperature ignition. |
| Organic Volatile Impurities | Gas Chromatography (GC-FID) | Separates and quantifies residual solvents using capillary column and flame ionization detection. |
| Color Value (E10% 1cm at 517 nm) | UV-Vis Spectrophotometry | Reports specific absorbance of 0.1 g/100 mL solution in water at defined wavelength and path length. |
| Iron Impurity | ICP-OES | Quantifies iron after acid digestion by measuring element-specific emission intensity in inductively coupled plasma. |
| Microbial Contamination | Membrane Filtration and Plate Count | Detects aerobic microorganisms by filtration, membrane transfer to agar media, and colony enumeration after incubation. |
Technical Specifications of EOSIN
| Test Item | Specification |
|---|---|
| Appearance | Red to dark red crystalline powder |
| Purity | >=98.5% |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=1.2% |
| Single Impurity | <=0.3% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.1% |
| Solubility | Freely soluble in water and ethanol; insoluble in chloroform and ether |
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 EOSIN
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of EOSIN
Packaging of EOSIN
Industrial EOSIN 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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