Direct Grey D Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 2945-96-2 |
| Product name | Direct Grey D |
| 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 Grey D
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Direct Grey D Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Direct Grey D
| Industry | Application | Process |
|---|---|---|
| Textile Dyeing and Printing | Dyeing of cotton, linen, and viscose fibers | Used in dip dyeing and jigger dyeing processes |
| Paper Industry | Coloring of paper | Applied via internal sizing or surface coating |
| Leather Processing | Dyeing of leather | Applied in immersion dyeing processes |
| Ink Manufacturing | Colorant for writing inks | Formulated and dispersed through grinding |
Manufacturing Quality Control of Direct Grey D
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantitative determination based on peak area comparison with a certified reference standard using reversed-phase chromatography and UV detection at 254 nm. |
| Moisture Content | Karl Fischer Titration | Electrochemical titration where iodine reacts stoichiometrically with water in a methanol-based solvent, measuring endpoint amperometrically. |
| Heavy Metals (as Pb) | ICP-OES | Multi-element quantification after acid digestion by measuring atomic emission intensities of metal ions in plasma at characteristic wavelengths. |
| Sulfated Ash | Gravimetric Analysis | Residue mass after high-temperature incineration of sample with sulfuric acid, expressed as percentage of original sample weight. |
| Chloride Impurity | Potentiometric Titration | Titration with silver nitrate using a silver/silver chloride electrode to detect endpoint via potential change due to AgCl precipitation. |
| pH (1% aqueous solution) | pH Meter Measurement | Electrometric measurement of hydrogen ion activity in a standardized aqueous suspension using calibrated glass electrode system. |
| Organic Impurities (Related Substances) | HPLC-DAD | Separation and detection of structurally similar compounds using gradient HPLC with diode-array detection for spectral confirmation. |
| Iron Content | AAS | Atomic absorption spectroscopy measuring absorbance of ground-state iron atoms at 248.3 nm after flame atomization. |
| Particle Size Distribution | Laser Diffraction | Analysis of light scattering pattern from dispersed particles in liquid medium to calculate volume-based size distribution. |
| Bulk Density | USP <616> Tap Density Method | Mass per unit volume determined after controlled mechanical tapping of a known mass in a graduated cylinder. |
| Loss on Drying | Thermogravimetric Analysis (TGA) | Weight loss measured under controlled heating (105 C, 2 h) in air, reported as percentage of initial mass. |
| Solubility in Water | Visual Observation & Filtration | Qualitative assessment of complete dissolution in specified volume of distilled water at 25 C, followed by filtration to confirm absence of residue. |
Technical Specifications of Direct Grey D
| Test Item | Specification |
|---|---|
| Appearance | Dark gray to black crystalline powder |
| Purity | >=98.5% |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.3% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.3% |
| Solubility | Soluble in water and common organic solvents (e.g., ethanol, acetone) |
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 Grey D
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
Packaging of Direct Grey D
Industrial Direct Grey D 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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