Direct Red 31 Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 5001-72-9 |
| Product name | Direct Red 31 |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Industrial GradeSpecialty 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 31
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Direct Red 31 Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Direct Red 31
| Industry | Application | Process |
|---|---|---|
| Dye Industry | Textile dyeing | Direct dyeing of fibers such as cotton, wool, and silk |
| Printing and Dyeing Industry | Direct dyes | Direct application to fibers under neutral or mildly alkaline conditions |
| Chemical Manufacturing | Chromatographic analysis reagent | Used as a chromatographic reference standard or color-developing agent in analytical chemistry |
Manufacturing Quality Control of Direct Red 31
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | UV-Vis Spectrophotometry | Quantifies dye concentration based on absorbance at characteristic lambda-max in standardized solvent system. |
| Moisture Content | Karl Fischer Titration | Measures water content via coulometric or volumetric titration with iodine-based reagent. |
| Inorganic Ash | Gravimetric Analysis | Determines non-volatile residue after controlled high-temperature incineration. |
| Heavy Metals (Pb, Cd, Hg, As) | ICP-OES | Simultaneously quantifies trace metal impurities after acid digestion using plasma emission spectroscopy. |
| Chloride Content | Potentiometric Titration | Measures chloride ions using silver nitrate titrant and silver/silver chloride electrode. |
| pH of Aqueous Solution | pH Meter Measurement | Determines hydrogen ion activity in a defined aqueous suspension or solution. |
| Water Solubility | Visual Inspection / Filtration | Evaluates complete dissolution in specified volume of water at defined temperature and time. |
| Organic Impurities (Related Substances) | HPLC-UV | Separates and quantifies structurally related compounds using reversed-phase chromatography and UV detection. |
| Iron Content | AAS | Quantifies iron after acid digestion using atomic absorption spectroscopy at characteristic wavelength. |
| Sulfate Content | Gravimetric Analysis (Barium Sulfate Precipitation) | Measures sulfate as insoluble BaSO4 precipitate formed after barium chloride addition. |
| Bulk Density | ASTM D1895 | Determines mass per unit volume of freely settled powder using standardized cylinder and funnel apparatus. |
| Particle Size Distribution | Laser Diffraction | Measures size distribution of dry or dispersed particles via angular scattering pattern analysis. |
Technical Specifications of Direct Red 31
| 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) |
| Odor | Characteristic faint aromatic odor |
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 31
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
Packaging of Direct Red 31
Industrial Direct Red 31 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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