4-Amino-1,3-benzenedisulfonic acid Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 137-51-9 |
| Product name | 4-Amino-1,3-benzenedisulfonic acid |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeReagent GradeIndustrial GradeSpecialty 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-Amino-1,3-benzenedisulfonic acid
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 4-Amino-1,3-benzenedisulfonic acid Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 4-Amino-1,3-benzenedisulfonic acid
| Industry | Application | Process |
|---|---|---|
| Dye Industry | Intermediate for azo dyes and reactive dyes | Used in the synthesis of acid, direct, or reactive dyes via diazotization and coupling reactions |
| Chemical Reagents | Analytical reagent or organic synthesis intermediate | Participates in organic synthesis pathways such as sulfonation and amination to construct functional molecules containing sulfonic acid and amino groups |
| Pharmaceutical Industry | Synthesis of certain pharmaceuticals or pharmaceutical intermediates | Serves as a precursor in multistep syntheses; undergoes reduction, acylation, and other reactions to generate biologically active compounds |
| Textile Auxiliaries | Production of textile auxiliaries or fixing agents | Condensed with other sulfonic acid–containing compounds to enhance dye affinity to fibers and improve wash fastness |
Manufacturing Quality Control of 4-Amino-1,3-benzenedisulfonic acid
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | Acid-Base Titration | Quantifies active compound by neutralizing sulfonic acid groups with standardized NaOH solution. |
| Moisture Content | Karl Fischer Titration | Measures water content via iodine-sulfur dioxide redox reaction in methanol-based reagent. |
| Color (APHA) | Visual Comparison or Spectrophotometry | Compares sample color intensity against platinum-cobalt standard solutions at 455 nm. |
| Residue on Ignition | Gravimetric Analysis | Determines inorganic ash content by high-temperature incineration and weight measurement. |
| Chloride Impurity | Ion Chromatography (IC) | Separates and quantifies chloride ions using anion-exchange column and conductivity detection. |
| Sulfate Impurity | Barium Sulfate Gravimetry | Precipitates sulfate as BaSO4 and determines mass after filtration and drying. |
| Heavy Metals (as Pb) | Atomic Absorption Spectroscopy (AAS) | Measures total heavy metal content after wet digestion, using lead-specific hollow cathode lamp. |
| Iron Content | UV-Vis Spectrophotometry | Forms colored complex with 1,10-phenanthroline; absorbance measured at ~510 nm. |
| pH of Aqueous Solution | Potentiometric Measurement | Determines hydrogen ion activity using calibrated pH electrode in saturated aqueous suspension. |
| Organic Impurities | High-Performance Liquid Chromatography (HPLC) | Separates and quantifies related substances using reversed-phase C18 column and UV detection. |
| Melting Point | Capillary Melting Point Apparatus | Determines temperature range at which solid transitions to liquid under controlled heating. |
| Bulk Density | Graduated Cylinder Method | Measures mass per unit volume of freely settled powder in standardized cylinder. |
Technical Specifications of 4-Amino-1,3-benzenedisulfonic acid
| Test Item | Specification |
|---|---|
| Appearance | Yellow-green solid |
| Purity | >=98.0% |
| Water Content (KF) | <=0.5% |
| Melting Point | 235-240 °C |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Residue on Ignition | <=0.1% |
| Heavy Metals | <=20 ppm |
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-Amino-1,3-benzenedisulfonic acid
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of 4-Amino-1,3-benzenedisulfonic acid
Safety Information of 4-Amino-1,3-benzenedisulfonic acid
| Pictograms |  |
| Signal Word | Danger |
| Safety Data Sheet | |
Packaging of 4-Amino-1,3-benzenedisulfonic acid
Industrial 4-Amino-1,3-benzenedisulfonic 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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