Pigment Red 21 Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 6410-26-0 |
| Product name | Pigment Red 21 |
| 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 Pigment Red 21
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Pigment Red 21 Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Pigment Red 21
| Industry | Application | Process |
|---|---|---|
| Printing Inks | Used in the manufacture of printing inks to deliver vibrant red coloration | Dispersed with resins, solvents, and other additives, then ground and homogenized to formulate ink |
| Plastics | Applied as a colorant for plastic products to impart a red appearance | Blended with plastic raw materials at elevated temperatures, followed by extrusion or injection molding |
| Coatings | Used in coatings to provide a red hue | Dispersed with resins, solvents, and additives, then ground and adjusted during paint formulation |
| Papermaking | Applied for paper dyeing to deliver stable red coloration | Incorporated into pulp or coating formulations and processed through standard papermaking operations |
Manufacturing Quality Control of Pigment Red 21
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Purity (by HPLC) | HPLC with UV-Vis detection | Quantitative determination based on peak area comparison against certified reference standard using reversed-phase chromatography. |
| Color Strength | UV-Vis spectrophotometry | Measurement of absorbance at lambda-max in standardized dispersion, normalized to a reference batch. |
| Moisture Content | Karl Fischer titration | Electrochemical titration quantifying water via reaction with iodine and sulfur dioxide in pyridine-methanol medium. |
| Ash Content | Gravimetric analysis (incineration) | Residue mass after high-temperature incineration at 550 C, expressed as weight percent of original sample. |
| pH of Aqueous Extract | Potentiometric measurement | pH measured in aqueous suspension (1:10 w/v) using calibrated glass electrode. |
| Heavy Metals (Pb, Cd, Hg, Cr) | ICP-OES | Multi-element quantification after acid digestion by measuring element-specific emission intensities in argon plasma. |
| Particle Size Distribution | Laser diffraction | Analysis of light scattering pattern from dispersed particles to calculate volume-based size distribution. |
| Bulk Density | ASTM D1895 method A (tapped density) | Mass per unit volume determined after controlled tapping of sample in graduated cylinder. |
| Residue on Sieve (45 um) | Dry sieving | Mass of material retained on standard 45 um woven wire mesh after mechanical shaking. |
| Organic Volatile Impurities | Gas Chromatography (GC-FID) | Separation and quantification of volatile organics using capillary column and flame ionization detection. |
| Thermal Stability (TGA onset) | Thermogravimetric Analysis (TGA) | Temperature at which 1% weight loss occurs under nitrogen flow, indicating decomposition onset. |
| Water Soluble Salts | Conductivity measurement | Electrical conductivity of aqueous extract (1:10 w/v), correlated to total soluble electrolyte content. |
Technical Specifications of Pigment Red 21
| Test Item | Specification |
|---|---|
| Appearance | Red 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 | Insoluble in water; soluble in chlorinated hydrocarbons and nitrobenzene |
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 Pigment Red 21
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
Packaging of Pigment Red 21
Industrial Pigment Red 21 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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