2-Sulfobenzoic anhydride Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 81-08-3 |
| Product name | 2-Sulfobenzoic anhydride |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeMaterial GradeSpecialty GradeReagent 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 2-Sulfobenzoic anhydride
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 2-Sulfobenzoic anhydride Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 2-Sulfobenzoic anhydride
| Industry | Application | Process |
|---|---|---|
| Dye Industry | Intermediate for synthesizing anthraquinone-based acid dyes and reactive dyes | Condensed with aromatic amines or phenols to form sulfonyl dye molecules |
| Pharmaceutical Industry | Intermediate for synthesizing certain drugs (e.g., diuretics, anti-inflammatory agents) | Sulfonyl functional group introduced via acylation; participates in heterocycle construction |
| Surfactants | Production of anionic surfactants | Reacted with long-chain alcohols or amines to produce sulfosuccinate-based surfactants |
| Polymers Industry | Functional monomer for polymer modification | Copolymerized to incorporate hydrophilic sulfonic acid groups, enhancing material wettability or dyeability |
| Analytical Chemistry | Derivatization reagent | Reacted with amines or hydroxyl-containing compounds to generate detectable derivatives for chromatographic analysis |
Manufacturing Quality Control of 2-Sulfobenzoic anhydride
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC with UV detection | Quantifies 2-sulfobenzoic anhydride by retention time and peak area against a certified reference standard using reversed-phase chromatography and UV absorbance at ~254 nm. |
| Moisture Content | Karl Fischer titration | Determines water content via coulometric or volumetric titration based on the stoichiometric reaction of iodine with water in a pyridine/methanol solvent system. |
| Residue on Ignition | Gravimetric analysis (weight loss on ignition) | Measures inorganic impurities by weighing sample before and after high-temperature ashing (e.g., 750–800 °C) to determine non-volatile residue mass. |
| Heavy Metals (as Pb) | ICP-OES | Quantifies total heavy metals (e.g., Pb, Cd, Hg, As) after acid digestion by measuring characteristic atomic emission lines in inductively coupled plasma optical emission spectrometry. |
| Chloride Impurity | Ion Chromatography (IC) | Separates and quantifies chloride ions using anion-exchange column and suppressed conductivity detection following aqueous extraction. |
| Acid Value | Acid-base titration with NaOH | Determines free carboxylic acid groups (from hydrolysis impurities) by titration with standardized sodium hydroxide solution using phenolphthalein or potentiometric endpoint detection. |
| Melting Point | Capillary melting point apparatus | Measures temperature range at which solid transitions to liquid, indicating purity and identity via comparison to literature value (~138–142 °C). |
| Organic Volatile Impurities (e.g., solvents) | Gas Chromatography (GC-FID) | Identifies and quantifies residual volatile organic solvents (e.g., toluene, acetic anhydride) using capillary column separation and flame ionization detection. |
| Sulfur Content | Elemental combustion analysis (CHNS/O analyzer) | Determines total sulfur by high-temperature combustion followed by infrared detection of SO₂ generated from complete oxidation of sulfonic groups. |
| Appearance & Color | Visual inspection against APHA/Pt-Co scale | Assesses physical state (white to off-white crystalline powder) and color intensity by comparing dissolved sample solution to standardized platinum-cobalt color standards. |
| Particle Size Distribution | Laser diffraction | Measures particle size distribution in suspension using Mie scattering theory applied to angular intensity patterns of laser light passing through dispersed particles. |
| Residual Anhydride Reactivity | Potentiometric titration with water addition | Evaluates active anhydride functionality by controlled hydrolysis followed by titration of liberated acid with standardized base and potentiometric endpoint detection. |
| Microbial Contamination | Membrane filtration and plate count | Detects aerobic mesophilic microorganisms by filtration, membrane transfer to nutrient agar, incubation, and colony enumeration per ISO 11731 or USP <61>. |
Technical Specifications of 2-Sulfobenzoic anhydride
| Test Item | Specification |
|---|---|
| Appearance | White crystalline solid |
| Purity | >=98.5% |
| Water Content (KF) | <=0.5% |
| Melting Point | 138-142°C |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=10 ppm |
| Residue on Ignition | <=0.1% |
| Acid Value (mg KOH/g) | 250-270 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 2-Sulfobenzoic anhydride
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of 2-Sulfobenzoic anhydride
Packaging of 2-Sulfobenzoic anhydride
Industrial 2-Sulfobenzoic anhydride 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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