2,2'-Benzidinedisulfonic acid Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 117-61-3 |
| Product name | 2,2'-Benzidinedisulfonic acid |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Reagent GradeIndustrial GradeSpecialty 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 2,2'-Benzidinedisulfonic acid
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 2,2'-Benzidinedisulfonic acid Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 2,2'-Benzidinedisulfonic acid
| Industry | Application | Process |
|---|---|---|
| Dye Industry | Azo dye intermediate | Used in the synthesis of direct dyes, acid dyes, and other azo dyes via diazotization and coupling reactions to produce dyes with specific color spectra |
| Organic Synthesis | Organic synthesis intermediate | Acts as a bifunctional compound in condensation, sulfonation, and other reactions to construct complex aromatic molecular frameworks |
| Analytical Chemistry | Preparation of analytical reagents | Used to prepare specific chromogenic reagents or indicators for colorimetric analysis of metal ions or anions |
Manufacturing Quality Control of 2,2'-Benzidinedisulfonic acid
| Test Item | Common Testing Methods | Method Overview |
|---|---|---|
| Appearance | Visual Inspection | Observe the sample's color and physical state under natural light or standard lighting to determine whether it is a white or pale yellow crystalline powder and whether any impurities are present. |
| Assay | High-Performance Liquid Chromatography (HPLC) | Use a reversed-phase C18 column with an appropriate mixture of water and organic solvent (e.g., methanol or acetonitrile) containing an ion-pair reagent or buffer as the mobile phase. Quantify the main component using a UV detector via external standard or internal standard method. |
| Related Substances (Impurities) | High-Performance Liquid Chromatography (HPLC) | Same as above; separate the main peak from impurity peaks using gradient elution, detect, and calculate the relative content of each impurity to assess purity. |
| Water Content | Karl Fischer Titration | Utilize the quantitative reaction between iodine and sulfur dioxide in the presence of pyridine and methanol with water; determine water content via coulometric or volumetric methods. |
| Sulfonic Acid Group Content | Acid-Base Titration | Dissolve the sample and titrate the free sulfonic acid groups with a standardized sodium hydroxide solution; calculate the sulfonic acid group content based on the volume of alkali consumed. |
| pH Value | pH Meter Method | Prepare a solution of the sample at a specified concentration (e.g., 1%) and measure its acidity or alkalinity using a calibrated pH meter. |
| Residue on Ignition (Sulfate Ash) | Gravimetric Method | Ignite the sample at high temperature; weigh the residual inorganic material (primarily sulfates) and express the result as a percentage of the original sample weight. |
| Heavy Metals | Sulfide Colorimetric Method (e.g., Chinese Pharmacopoeia Method) | In weakly acidic conditions, heavy metals react with hydrogen sulfide to form colored sulfides; compare the color intensity with a standard lead solution for limit testing. |
| Loss on Drying | Thermogravimetric Analysis (TGA) or Oven Drying Method | Dry the sample at a specified temperature (e.g., 105°C) until constant weight is achieved; calculate the total loss due to water and volatile substances. |
Technical Specifications of 2,2'-Benzidinedisulfonic acid
| Test Item | Specification |
|---|---|
| Appearance | White to brown crystalline powder |
| Purity | >=98.0% (HPLC) |
| Water Content (KF) | <=0.5% |
| Melting Point | 235-240°C (decomposes) |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.3% |
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 2,2'-Benzidinedisulfonic acid
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of 2,2'-Benzidinedisulfonic acid
Safety Information of 2,2'-Benzidinedisulfonic acid
| Pictograms |   |
| Signal Word | Warning |
| Safety Data Sheet | |
Packaging of 2,2'-Benzidinedisulfonic acid
Industrial 2,2'-Benzidinedisulfonic 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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