tetrasodium 4,4'-[carbonylbis[imino(5-methoxy-2-methyl-4,1-phenylene)azo]]bis[5-hydroxynaphthalene-2,7-disulphonate] Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 1937-34-4 |
| Product name | tetrasodium 4,4'-[carbonylbis[imino(5-methoxy-2-methyl-4,1-phenylene)azo]]bis[5-hydroxynaphthalene-2,7-disulphonate] |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Material GradeSpecialty GradeIndustrial 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 1937-34-4
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 1937-34-4 Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 1937-34-4
| Industry | Application | Process |
|---|---|---|
| Textile Dyeing & Printing | Direct dyeing and printing of cotton and viscose rayon | Exhaust dyeing, jigger dyeing, pad dyeing, and printing (requires addition of sodium chloride as a dyeing accelerator; aftertreatment with fixing agents improves wet fastness) |
| Papermaking | Coloration of paper (e.g., colored paper, decorative paper) | Internal dyeing by adding dye to the pulp during sheet formation |
| Leather Processing | Dyeing of leather (primarily light leathers) | Exhaust dyeing at pH 4–6; commonly used in combination with acid dyes for tone adjustment |
| Biological Staining | Staining of histological sections (e.g., connective tissue, cytoplasm) | Substitute or complementary stain to eosin in routine H&E staining; requires preparation of aqueous solution at appropriate concentration |
Manufacturing Quality Control of 1937-34-4
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | UV-Vis Spectrophotometry | Quantifies dye concentration based on absorbance at characteristic lambda-max using Beer-Lambert law with reference standard. |
| Moisture Content | Karl Fischer Titration | Measures water content via stoichiometric reaction between water and iodine in a methanol-based reagent. |
| Inorganic Ash | Gravimetric Analysis (Ignition at 550 C) | Determines non-volatile inorganic residue after high-temperature incineration and weighing. |
| Heavy Metals (Pb, Cd, Hg, As) | ICP-OES | Simultaneously quantifies trace metal impurities by measuring element-specific atomic emission intensities in plasma. |
| Chloride Content | Potentiometric Titration with AgNO3 | Measures chloride ions via titration with silver nitrate using silver indicator electrode and endpoint detection. |
| pH of Aqueous Solution | pH Meter Measurement | Determines hydrogen ion activity in a standardized 1% w/v aqueous solution at 25 C. |
| Water Solubility | Visual Dissolution Test | Assesses complete dissolution in distilled water at specified temperature and concentration within defined time. |
| Organic Impurities (Related Substances) | HPLC with UV Detection | Separates and quantifies structurally related compounds using reversed-phase chromatography and UV absorbance. |
| Iron Content | AAS (Flame Atomic Absorption Spectroscopy) | Measures iron concentration by atomizing sample and detecting absorption of specific Fe spectral line. |
| Sulfate Content | Gravimetric Analysis (as BaSO4) | Precipitates sulfate as barium sulfate, filters, dries, and weighs the insoluble residue. |
| Bulk Density | Tap Density Measurement | Determines mass per unit volume after standardized tapping of powder in calibrated cylinder. |
| Particle Size Distribution | Laser Diffraction | Measures size distribution by analyzing angular variation in laser light scattering from dispersed particles. |
Technical Specifications of 1937-34-4
| Test Item | Specification |
|---|---|
| Appearance | Red to burgundy crystalline powder |
| Purity | >=98.5% |
| Total Impurities | <=1.0% |
| Water Content (KF) | <=0.5% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.3% |
| Solubility | Freely soluble in water; slightly soluble in ethanol |
| Color (APHA/Pt-Co) | N/A (solid, not applicable) |
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 1937-34-4
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
Packaging of 1937-34-4
Industrial 1937-34-4 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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