CHROMOTROPE 2R Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 4197-07-3 |
| Product name | CHROMOTROPE 2R |
| 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 CHROMOTROPE 2R
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk CHROMOTROPE 2R Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of CHROMOTROPE 2R
| Industry | Application | Process |
|---|---|---|
| Textile Dyeing and Printing | Dyeing of cotton and linen fabrics | Acid dyeing process |
| Leather Processing | Leather coloring | Acid dye tanning process |
| Paper Manufacturing | Dyeing of specialty papers | Surface sizing dyeing process |
| Ink Manufacturing | Colorant for solvent-based inks | Pigment dispersion process |
| Plastic Products | Colorant for certain plastics | Melt compounding coloring process |
Manufacturing Quality Control of CHROMOTROPE 2R
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | UV-Vis Spectrophotometry | Measures absorbance at characteristic wavelength (approx. 520 nm) and calculates concentration using Beer-Lambert law and certified reference standard. |
| Moisture Content | Karl Fischer Titration | Quantifies water via coulometric or volumetric titration with iodine-based reagent, based on stoichiometric reaction with water. |
| Heavy Metals (as Pb) | Atomic Absorption Spectroscopy (AAS) | Determines total heavy metal content after acid digestion by measuring atomic absorption of ground-state atoms in flame or graphite furnace. |
| Chloride Impurity | Potentiometric Titration with AgNO3 | Uses silver nitrate titrant and chloride-selective electrode to detect endpoint based on change in potential upon AgCl precipitation. |
| Sulfate Impurity | Gravimetric Analysis | Precipitates sulfate as BaSO4 under controlled conditions and determines mass after drying and weighing. |
| pH of Aqueous Solution | pH Meter Measurement | Measures hydrogen ion activity in a 1% w/v aqueous solution using calibrated glass electrode and reference electrode. |
| Organic Volatile Impurities | Gas Chromatography (GC) | Separates and quantifies residual solvents and volatile organics using capillary column and flame ionization detection. |
| Residue on Ignition | Gravimetric Analysis (Ignition Loss) | Measures non-volatile inorganic residue after heating sample at 600-800 C in muffle furnace and weighing cooled crucible. |
| Particle Size Distribution | Laser Diffraction | Analyzes scattered laser light intensity pattern to calculate size distribution of dry or dispersed particles. |
| Color Value (APHA) | Visual Comparison or Spectrophotometric APHA | Compares sample solution color against platinum-cobalt standard scale or calculates APHA index from UV-Vis absorbance at 430 nm. |
| Water Insolubles | Filtration and Gravimetry | Filters aqueous solution through pre-weighed membrane filter, dries residue, and determines mass difference. |
| Specific Optical Rotation | Polarimetry | Measures rotation angle of plane-polarized light passing through solution to assess chiral purity and identity. |
Technical Specifications of CHROMOTROPE 2R
| Test Item | Specification |
|---|---|
| Appearance | Brown solid |
| Purity | >=98.0% (HPLC) |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Water Content (KF) | <=0.5% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.1% |
| Solubility | Soluble in water and ethanol (1:1 v/v) |
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 2R
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of CHROMOTROPE 2R
Packaging of CHROMOTROPE 2R
Industrial CHROMOTROPE 2R 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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