CHROMOTROPE 2B Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 548-80-1 |
| Product name | CHROMOTROPE 2B |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Material GradeSpecialty GradeIndustrial GradeFood GradeCosmetic 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 CHROMOTROPE 2B
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk CHROMOTROPE 2B Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of CHROMOTROPE 2B
| Industry | Application | Process |
|---|---|---|
| Dyeing & Printing | Direct dyeing of cotton, viscose, and other fabrics | Applied directly to the dye bath; temperature control facilitates dye uptake |
| Paper Coloring | Coloring specialty or decorative papers | Incorporated during papermaking; shade intensity is controlled by adjusting pH and temperature |
| Leather Processing | Colorant for leather surface finishing | Used as a water-soluble dye, added in post-tanning stages to impart specific hues to leather |
| Stationery Manufacturing | Pigment for art supplies such as watercolor pens and inks | Blended with other components to formulate products in the required colors |
| Food Industry (Note: Actual use must comply with applicable national regulations) | Permitted in certain countries as a food additive for coloring specific food products | Added according to product type and local regulatory requirements |
| Cosmetics | Base colorant for certain cosmetic products, such as lipsticks | Uniformly mixed with other raw materials to produce the final formulation |
Manufacturing Quality Control of CHROMOTROPE 2B
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Chromic Acid Equivalent) | Acid-Base Titration | Quantifies chromic acid content via redox titration with standardized ferrous ammonium sulfate solution under acidic conditions. |
| Heavy Metals (Pb, Cd, Hg, As) | ICP-OES | Simultaneous multi-element quantification after acid digestion using inductively coupled plasma optical emission spectroscopy. |
| Water Content | Karl Fischer Titration | Electrochemical determination of water based on iodine-sulfur dioxide reaction stoichiometry in anhydrous methanol medium. |
| Sulfate Impurity | Gravimetric Analysis | Precipitation of sulfate as barium sulfate followed by filtration, drying, and weighing. |
| Chloride Impurity | Ion Chromatography | Separation and quantification of chloride anions using ion-exchange column and conductivity detection. |
| Iron Content | AAS | Atomic absorption spectroscopy measurement of iron after sample dissolution and matrix matching. |
| pH of Aqueous Solution | Potentiometric Measurement | Determination of hydrogen ion activity using calibrated pH electrode in a 1% w/v aqueous solution. |
| Loss on Drying | Thermogravimetric Analysis | Mass loss measured after heating at 105 C for 2 hours to assess volatile and moisture content. |
| Residue on Ignition | Ignition and Gravimetry | Non-volatile residue quantified after high-temperature ashing at 800 C followed by weighing. |
| Particle Size Distribution | Laser Diffraction | Analysis of scattered light intensity patterns to determine size distribution of dry powder sample. |
| Organic Impurities | HPLC-UV | Separation on reversed-phase column with UV detection at 254 nm to identify and quantify organic contaminants. |
| Bulk Density | Tap Density Measurement | Volume occupied by a known mass of powder after standardized mechanical tapping per ASTM D1895. |
Technical Specifications of CHROMOTROPE 2B
| Test Item | Specification |
|---|---|
| Appearance | Crystalline Powder |
| Purity | >=98.0% |
| Water Content (KF) | <=0.5% |
| Melting Point | 178–182°C |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.1% |
| Color (APHA/Pt-Co) | <=100 |
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 CHROMOTROPE 2B
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of CHROMOTROPE 2B
Packaging of CHROMOTROPE 2B
Industrial CHROMOTROPE 2B 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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