1,8-Dihydroxynaphthylene-3,6-disulfonic acid Bulk Supply for Industrial Use
China Factory Direct
 |
|
| CAS number | 148-25-4 |
| Product name | 1,8-Dihydroxynaphthylene-3,6-disulfonic acid |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeMaterial GradeSpecialty 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) |
QUOTE TYPE
PACKAGING TYPE
TOTAL QUANTITY(KG)
PREFERRED SHIPPING METHOD
YOUR COMPANY
YOUR E-MAIL
Calculate Summary
Based on current marketvolatility and material availability.
Documents We Provide for 1,8-Dihydroxynaphthylene-3,6-disulfonic acid
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 1,8-Dihydroxynaphthylene-3,6-disulfonic acid Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 1,8-Dihydroxynaphthylene-3,6-disulfonic acid
| Industry | Application | Process |
|---|---|---|
| Chemical Analysis | Used as a colorimetric reagent for detecting formaldehyde, hydrazine, sulfur dioxide, and other compounds | Reacted with analytes under acidic conditions to form a magenta-colored complex; quantified by colorimetry |
| Textile Industry | Used in the synthesis of dye intermediates | Applied as a coupling component in diazotization-coupling reactions to produce azo dyes |
| Paper Industry | Used for paper coloring and colorimetric detection | Reacted with lignin or residual formaldehyde in pulp to generate a visible color change, enabling assessment of treatment efficacy |
| Environmental Monitoring | Used for sampling and detecting formaldehyde in ambient air | Airborne formaldehyde is absorbed into solution, then reacted with chromotropic acid to develop color; absorbance is measured by spectrophotometry |
| Biochemistry | Used for tissue section staining and detection of cellular components | Reacted with polysaccharides or certain proteins to enhance contrast in histological staining |
Manufacturing Quality Control of 1,8-Dihydroxynaphthylene-3,6-disulfonic acid
| Test Item | Common Test Method | Method Overview |
|---|---|---|
| Appearance | Visual Inspection | Observe the color and physical state of the sample. Pure product is white or light yellow crystalline powder, which may turn pink or brown upon exposure to moisture or light. |
| Melting Point | Melting Point Determination (Capillary Method) | Determine the melting temperature. Chrome Azurol S melts at approximately 230–235 °C (with decomposition). Melting point is used to assess purity. |
| Solubility | Solubility Test | Check solubility in solvents such as water, ethanol, etc. Chrome Azurol S is readily soluble in water, slightly soluble in ethanol, and insoluble in ethers. |
| Infrared Spectroscopy (IR) | Fourier Transform Infrared Spectroscopy (FT-IR) | Confirm molecular structure through characteristic absorption peaks (e.g., —SO₃H, —OH, aromatic ring skeleton vibrations), used for identification and authenticity verification. |
| UV-Visible Absorption Spectroscopy | UV-Vis Spectrophotometry | Detect maximum absorption peaks at specific wavelengths (e.g., around 210 nm, 270 nm) for quantitative analysis or purity assessment. |
| Assay | Acid-Base Titration | Utilize the acidity of the sulfonic acid group; titrate with standard NaOH solution to calculate total acid content and indirectly determine the active ingredient concentration. |
| Moisture Content | Karl Fischer Titration | Precisely measure moisture content in the sample to prevent performance and stability issues caused by hygroscopicity. |
| Sulfonic Acid Group Content | Elemental Analysis or Ion Chromatography | Determine sulfur content or free SO₃⁻ concentration to verify the integrity of sulfonic acid groups in the molecule. |
| Impurity Limit | Thin-Layer Chromatography (TLC) | Use an appropriate developing system to check for organic impurity spots and evaluate purity. |
| Heavy Metals | Heavy Metal Limit Test (Colorimetric Method) | According to pharmacopoeia methods, react with hydrogen sulfide or thioacetamide to detect whether heavy metal impurities such as lead and iron exceed allowable limits. |
Technical Specifications of 1,8-Dihydroxynaphthylene-3,6-disulfonic acid
| Test Item | Specification |
|---|---|
| Appearance | White to Light yellow to Light orange powder to crystal |
| Purity | ≥98.0% |
| Insolubles | ≤0.3% |
| Water | ≤2.0% |
| H-acid | ≤1.0% |
Specifications vary by industry. Reach out to our technical experts for a COA tailored specifically to your application. Email:selse@GRchemical.com
|
|
Download COA of 1,8-Dihydroxynaphthylene-3,6-disulfonic acid
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
Safety Information of 1,8-Dihydroxynaphthylene-3,6-disulfonic acid
| Pictograms |  |
| Signal Word | Warning |
| Safety Data Sheet | |
Packaging of 1,8-Dihydroxynaphthylene-3,6-disulfonic acid
Industrial 1,8-Dihydroxynaphthylene-3,6-disulfonic 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.
Use Bulk
Supply Factory
Direct ISO 9001
Certified Samples
Available Stable
Supply