Direct Red 75 tetrasodium salt Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 2829-43-8 |
| Product name | Direct Red 75 tetrasodium salt |
| 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 Direct Red 75 tetrasodium salt
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Direct Red 75 tetrasodium salt Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Direct Red 75 tetrasodium salt
| Industry | Application | Process |
|---|---|---|
| Textile Dyeing and Printing | Used for dyeing and printing cellulose fibers such as cotton and viscose rayon | Applied via direct dyeing, typically in neutral or mildly alkaline dye baths; compatible with other direct dyes for shade matching |
| Paper Manufacturing | Used for paper coloring to impart vivid red hues | Added during the pulp stage or surface sizing, achieving uniform coloration through immersion or coating processes |
| Leather Processing | Used for leather dyeing to impart red shades | Applied via immersion or brush dyeing in the post-tanning dyeing step |
| Biological Staining | Used as a biological stain in histology or cytology | Prepared as an aqueous solution for staining microscopic tissue sections to enhance contrast of specific structures |
Manufacturing Quality Control of Direct Red 75 tetrasodium salt
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | UV-Vis Spectrophotometry | Quantifies dye concentration based on absorbance at characteristic wavelength (lambda-max) using Beer-Lambert law. |
| Moisture Content | Karl Fischer Titration | Measures water content via coulometric or volumetric titration with iodine-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 multiple heavy metal elements by measuring atomic emission intensities in plasma. |
| Chloride Content | Potentiometric Titration with AgNO3 | Measures chloride ions via silver nitrate titration using silver indicator electrode. |
| pH of 1% Aqueous Solution | pH Meter Measurement | Determines acidity/basicity of standardized aqueous dispersion using calibrated pH electrode. |
| Water Solubility | Gravimetric Filtration and Drying | Evaluates solubility by dissolving sample in water, filtering insoluble residue, and drying/weighing. |
| Substantivity (on Cotton) | Visual Comparison or Reflectance Spectrophotometry | Assesses dye affinity by comparing color strength on dyed cotton fabric vs. standard. |
| Organic Impurities (Related Substances) | HPLC with UV Detection | Separates and quantifies structurally related impurities using reversed-phase chromatography and UV detection. |
| Particle Size Distribution | Laser Diffraction | Measures size distribution of dry or dispersed particles by analyzing angular scattering pattern of laser beam. |
| Bulk Density | ASTM D1895 Method A (Tapped Density) | Determines mass per unit volume after controlled tapping of powder in graduated cylinder. |
| Sodium Sulfate Content | Ion Chromatography | Quantifies sulfate anion (from sodium sulfate) by separation on ion-exchange column with conductivity detection. |
Technical Specifications of Direct Red 75 tetrasodium salt
| Test Item | Specification |
|---|---|
| Appearance | Red to maroon crystalline powder |
| Purity | >=98.5% |
| Total Impurities | <=1.5% |
| 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) | Not applicable (solid) |
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 Direct Red 75 tetrasodium salt
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
Packaging of Direct Red 75 tetrasodium salt
Industrial Direct Red 75 tetrasodium salt 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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