1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 90-20-0 |
| Product name | 1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical 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 1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid
| Industry | Application | Process |
|---|---|---|
| Dye Industry | Intermediate for synthesizing acid dyes and direct dyes | Sulfonated with sulfuric acid, followed by amination |
| Pigment Industry | Intermediate for synthesizing organic pigments | Prepared via sulfonation and amination for high-performance organic pigment production |
| Pharmaceutical Industry | Intermediate for synthesizing certain pharmaceuticals | Used as a key intermediate in synthetic pathways to construct specific drug molecules |
| Organic Synthesis | Organic synthesis intermediate | Employed in multi-step organic reactions to synthesize complex organic compounds |
Manufacturing Quality Control of 1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid
| Test Item | Common Testing Method | Method Overview |
|---|---|---|
| Appearance and Color | Visual Inspection + Spectrophotometry | Observe the powder color by eye (should be light yellow to brown), and measure the absorbance of its aqueous solution at specific wavelengths (e.g., 400–500 nm) using a UV-Vis spectrophotometer to evaluate color consistency. |
| Content (Purity) | High-Performance Liquid Chromatography (HPLC) | Use a C18 reversed-phase column with gradient elution of water-methanol or water-acetonitrile. Detect using a UV detector at 254 nm or 280 nm. Quantify the main component via external or internal standard method, typically requiring ≥98% purity. |
| Moisture Content | Karl Fischer Titration | Use Karl Fischer reagent (composed of iodine, sulfur dioxide, pyridine, and methanol) to react quantitatively with water. Determine trace moisture content by potentiometric or coulometric titration, controlling moisture ≤1.0%. |
| Sulfate Impurities | Barium Sulfate Turbidimetry | After acidifying the sample, add barium chloride solution to form barium sulfate precipitate. Compare turbidity in a colorimetric tube against a standard sulfate solution to quantitatively control sulfate impurity levels (e.g., ≤0.1%). |
| Heavy Metal Impurities | Atomic Absorption Spectroscopy (AAS) or ICP-MS | After wet digestion of the sample, determine heavy metals such as lead, cadmium, arsenic, and mercury using atomic absorption spectrometer or inductively coupled plasma mass spectrometry (ICP-MS), meeting pharmacopeia or environmental standards (e.g., Pb ≤5 ppm). |
| Unreacted Starting Material (1,8-Dihydroxynaphthalene) | HPLC Method | Use the same HPLC method as for the main component (H-acid). Identify and quantify unreacted starting material (e.g., 1,8-dihydroxynaphthalene) by comparing retention times and peak areas, with limits typically ≤0.2%. |
| Chloride Impurities | Titration with Silver Nitrate or Ion Chromatography | Chloride ions react with silver nitrate to form silver chloride precipitate. Quantify chloride content by titration endpoint or ion chromatography (anion-exchange column with conductivity detection), controlling chloride levels ≤0.05%. |
| pH Value | pH Meter Measurement | Prepare a 1% aqueous solution and measure pH at 25°C using a calibrated pH meter. Control pH within a specified range (typically 2.0–4.0), reflecting the dissociation state of sulfonic acid groups. |
| Solubility and Solution Clarity | Visual Turbidity Comparison + Spectrophotometry | Dissolve the sample in water or dilute alkali solution and observe solution clarity visually. If necessary, measure turbidity at 550 nm using a UV spectrophotometer to ensure absence of suspended particles or colloids. |
| Melting Point | Melting Point Apparatus | Determine the melting range of dried sample using a capillary melting point apparatus (literature value approximately 220–225°C with decomposition), used for identification and preliminary purity assessment. |
| Nitrogen Content (Elemental Analysis) | Kjeldahl Method or Elemental Analyzer | Digest the sample with acid to convert organic nitrogen into ammonia, then measure nitrogen content by titration or infrared detection. Verify theoretical nitrogen content from molecular formula (theoretical N ≈ 5.5%). |
Technical Specifications of 1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid
| Test Item | Specification |
|---|---|
| Appearance | Grey to brown powder |
| Purity | ≥98.0% |
| Active content | ≥85.0% |
| Chromotropic acid | ≤1.0% |
| Omega acid | ≤0.3% |
| T acid | ≤0.3% |
| Thealkali insolubles | ≤0.2 |
| Water | ≤5.0% |
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 1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of 1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid
Safety Information of 1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid
| Pictograms |  |
| Signal Word | Danger |
| Safety Data Sheet | |
Packaging of 1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid
Industrial 1-Amino-8-hydroxynaphthalene-3,6-disulphonic 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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