2-Amino-4,8-naphthalenedisulfonic acid Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 131-27-1 |
| Product name | 2-Amino-4,8-naphthalenedisulfonic acid |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeMaterial GradeSpecialty GradeIndustrial Grade |
| Packaging | 25L/drum200L/drum1000L/IBC |
| 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-Amino-4,8-naphthalenedisulfonic acid
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 2-Amino-4,8-naphthalenedisulfonic acid Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 2-Amino-4,8-naphthalenedisulfonic acid
| Industry | Application | Process |
|---|---|---|
| Dye Industry | Used as an intermediate for azo dyes and acid dyes, e.g., Direct Black and Direct Blue | Diazotized followed by coupling with aromatic amines or phenolic compounds |
| Textile Printing & Dyeing | Serves as a key component in reactive and direct dyes, delivering deep shades and good wet fastness | Dyeing carried out under alkaline or neutral conditions, with fixation to fibers via covalent bonding or van der Waals forces |
| Paper Industry | Used as a synthetic intermediate for paper colorants and fluorescent whitening agents | Reacted with active groups such as cyanuric chloride to produce functional paper dyes |
| Pharmaceutical Industry | Serves as a synthetic intermediate for certain sulfonamide drugs and diagnostic reagents | Pharmacophoric groups introduced via acylation, condensation, and related reactions |
Manufacturing Quality Control of 2-Amino-4,8-naphthalenedisulfonic acid
| Test Item | Common Testing Method | Method Overview |
|---|---|---|
| Appearance | Visual Inspection | Observe the sample's color, physical state, and visible impurities under natural light or standard illumination to determine whether it meets specified characteristics. |
| Content Determination | High-Performance Liquid Chromatography (HPLC) | Use a reversed-phase C18 column with methanol-buffer solution as the mobile phase, UV detection, and external or internal standard methods for quantitative determination of the main component. |
| Related Substances (Impurities) | High-Performance Liquid Chromatography (HPLC) | Separate the main peak from impurity peaks using gradient elution; detect and quantify each impurity to assess purity and impurity profile. |
| Sulfonation Degree / Substitution Position Confirmation | Nuclear Magnetic Resonance Spectroscopy (NMR, e.g., ¹H-NMR, ¹³C-NMR) | Analyze proton and carbon signals to confirm the position and number of sulfonic acid groups, verifying structural correctness. |
| Water Content | Karl Fischer Titration | Determine moisture content by quantitatively reacting water with iodine and sulfur dioxide in a pyridine-methanol system. |
| Residue on Ignition (Sulfate Ash) | Gravimetric Method | Ignite the sample at high temperature until constant weight; the residue represents inorganic salts (mainly sulfates), calculated as a percentage of the sample mass. |
| pH Value | pH Meter Measurement | Dissolve the sample in deionized water, then measure the pH using a calibrated pH meter to control acidity/alkalinity within specified limits. |
| Solubility | Solubility Test | Observe the dissolution behavior of the sample in solvents such as water and ethanol to evaluate its solubility performance against requirements. |
| Heavy Metals | Atomic Absorption Spectroscopy (AAS) or Inductively Coupled Plasma Mass Spectrometry (ICP-MS) | After sample digestion, determine levels of lead, arsenic, cadmium, and other heavy metals to ensure compliance with safety limit standards. |
Technical Specifications of 2-Amino-4,8-naphthalenedisulfonic acid
| Test Item | Specification |
|---|---|
| Appearance | White to off-white crystalline powder |
| Purity | >=98.5% (HPLC) |
| Water Content (KF) | <=0.5% |
| Melting Point | 270-275°C (decomposes) |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.1% |
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-Amino-4,8-naphthalenedisulfonic acid
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of 2-Amino-4,8-naphthalenedisulfonic acid
Safety Information of 2-Amino-4,8-naphthalenedisulfonic acid
| Pictograms |  |
| Signal Word | Warning |
| Safety Data Sheet | |
Packaging of 2-Amino-4,8-naphthalenedisulfonic acid
Industrial 2-Amino-4,8-naphthalenedisulfonic 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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