China Factory Direct
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| CAS number | 68015-60-1 |
| Product name | 2-Aminobenzenesulfonic acid (1-methylethylidene)di-4,1-phenylene ester |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Material GradeSpecialty GradeIndustrial Grade |
| Packaging | 25KG/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) |
Based on current marketvolatility and material availability.
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
| Industry | Application | Process |
|---|---|---|
| Dye Industry | Intermediate for azo dyes, used in the synthesis of high-molecular-weight acid or reactive dyes | Sulfonic acid groups are introduced via diazotization and coupling reactions to enhance water solubility and fiber affinity |
| Textile Dyeing and Printing | Component of dye formulations for wool, nylon, and other fibers to improve color fastness and brightness | Applied in immersion dyeing or printing processes under acidic or neutral conditions |
| Polymer Materials | Functional monomer in polyamide or polyester synthesis, imparting heat resistance and ion-exchange capability | Copolymerized with diacids or diols via condensation polymerization to yield polymers bearing sulfonic acid side chains |
| Electrochemical Materials | Precursor for ion-exchange membranes or proton-conducting membranes | Films formed by solution casting or interfacial polymerization, followed by sulfonation to enhance conductivity |
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantitative determination using reverse-phase HPLC with UV detection at 254 nm, calibrated against certified reference standard. |
| Moisture Content | Karl Fischer Titration | Electrochemical titration measuring water content based on iodine-sulfur dioxide reaction in pyridine-methanol solvent system. |
| Residual Solvents | GC-FID | Separation and quantification of volatile organic solvents using capillary GC with flame ionization detection. |
| Heavy Metals (Pb, Cd, Hg, Cr) | ICP-OES | Multi-element quantification after acid digestion by measuring atomic emission intensities in argon plasma. |
| Chloride Impurity | Ion Chromatography | Anion separation on suppressed conductivity detector using carbonate/bicarbonate eluent. |
| Sulfate Impurity | Ion Chromatography | Anion separation on suppressed conductivity detector using carbonate/bicarbonate eluent. |
| Related Substances | HPLC-DAD | Identification and quantification of structurally related impurities using diode array detection for spectral confirmation. |
| Acid Value | Acid-Base Titration | Neutralization of acidic groups with standardized KOH ethanol solution using phenolphthalein indicator. |
| Melting Point | Capillary Melting Point Apparatus | Thermal transition observed visually as solid-to-liquid phase change under controlled heating rate. |
| Appearance | Visual Inspection | Assessment of physical state, color, and presence of foreign particles under standardized white light and against white background. |
| Residue on Ignition | Gravimetric Analysis | Mass measurement of non-volatile inorganic residue after high-temperature ashing at 700-800 C. |
| Particle Size Distribution | Laser Diffraction | Analysis of scattered laser light intensity to determine volume-based particle size distribution in dispersed suspension. |
| Test Item | Specification |
|---|---|
| Appearance | Off-white crystalline solid |
| Purity | >=98.5% (by LC-MS) |
| Melting Point | 245–249 °C |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Water Content (KF) | <=0.5% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.3% |
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| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
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.