4,4'-SULFONYLBIS-BENZOIC ACID Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 2449-35-6 |
| Product name | 4,4'-SULFONYLBIS-BENZOIC ACID |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeMaterial 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) |
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Documents We Provide for 4,4'-SULFONYLBIS-BENZOIC ACID
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 4,4'-SULFONYLBIS-BENZOIC ACID Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 4,4'-SULFONYLBIS-BENZOIC ACID
| Industry | Application | Process |
|---|---|---|
| Polymers | Monomer for synthesizing high-performance engineering plastics such as polyethersulfone (PES) | Condensation polymerization |
| Polymers | Copolymer monomer for preparing polyamide-imide (PAI) | High-temperature solution condensation polymerization |
| Pharmaceuticals | Intermediate in the synthesis of active pharmaceutical ingredients (APIs) | Organic synthesis |
| Dyes and Pigments | Intermediate for producing high-performance dyes and pigments | Coupling and sulfonation reactions |
| Fine Chemicals | Used to synthesize ultraviolet (UV) absorbers or stabilizers | Esterification or amidation reactions |
Manufacturing Quality Control of 4,4'-SULFONYLBIS-BENZOIC ACID
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | Acid-Base Titration with NaOH | Quantifies carboxylic acid groups via neutralization with standardized sodium hydroxide solution using phenolphthalein or potentiometric endpoint detection. |
| Residual Solvents (e.g., DMF, THF) | Gas Chromatography (GC) with FID or MS detection | Separates and quantifies volatile organic solvents based on retention time and peak area against calibrated standards. |
| Heavy Metals (Pb, Cd, Hg, As) | ICP-MS or ICP-OES after acid digestion | Measures trace metal concentrations following microwave-assisted nitric/hydrochloric acid digestion and plasma-based elemental detection. |
| Chloride Impurity | Ion Chromatography (IC) or Potentiometric Titration with AgNO₃ | Separates and quantifies chloride ions via ion-exchange chromatography or determines by argentometric titration using silver nitrate. |
| Sulfate Impurity | Gravimetric Analysis or IC | Precipitates sulfate as barium sulfate for mass-based quantification, or separates/quantifies via ion chromatography with conductivity detection. |
| Moisture Content | Karl Fischer Coulometric Titration | Determines water content electrochemically by iodine generation and stoichiometric reaction with water in anhydrous methanol/pyridine medium. |
| Melting Point | Capillary Melting Point Apparatus | Measures temperature range at which solid transitions to liquid, indicating purity and identity based on sharpness and agreement with literature value (~285–287 °C). |
| Organic Impurities (Related Substances) | HPLC with UV Detection (254 nm) | Separates and quantifies structurally related compounds (e.g., mono-acid, desulfonylated, dimeric impurities) using reversed-phase C18 column and UV absorbance. |
| Ash Content | Gravimetric Analysis after Muffle Furnace Incineration | Determines inorganic residue mass remaining after high-temperature (550–600 °C) combustion of sample in platinum crucible. |
| Particle Size Distribution | Laser Diffraction (Dry Dispersion) | Measures volumetric particle size distribution by analyzing angular scattering pattern of laser light passing through dispersed powder sample. |
| Color (APHA) | Visual Comparison or Spectrophotometric Measurement | Evaluates yellowness/browning intensity by comparing sample solution (in suitable solvent, e.g., DMSO) against APHA platinum-cobalt standard scale. |
| Residual Catalyst (e.g., Pd) | ICP-OES after microwave digestion | Quantifies palladium residues post-acid digestion using plasma emission at characteristic wavelength (e.g., 224.4 nm or 340.46 nm). |
Technical Specifications of 4,4'-SULFONYLBIS-BENZOIC ACID
| Test Item | Specification |
|---|---|
| Appearance | White crystalline solid |
| Purity | >=98.0% (HPLC) |
| Melting Point | 248–252°C |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Residue on Ignition | <=0.1% |
| Acid Value (mg KOH/g) | 365–375 mg KOH/g |
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 4,4'-SULFONYLBIS-BENZOIC ACID
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of 4,4'-SULFONYLBIS-BENZOIC ACID
Safety Information of 4,4'-SULFONYLBIS-BENZOIC ACID
| Pictograms |  |
| Signal Word | Warning |
| Safety Data Sheet | |
Packaging of 4,4'-SULFONYLBIS-BENZOIC ACID
Industrial 4,4'-SULFONYLBIS-BENZOIC ACID 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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