Naphthalene-2-sulfonic acid Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 120-18-3 |
| Product name | Naphthalene-2-sulfonic acid |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Industrial 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 Naphthalene-2-sulfonic acid
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Naphthalene-2-sulfonic acid Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Naphthalene-2-sulfonic acid
| Industry | Application | Process |
|---|---|---|
| Dyes and Pigments Industry | Dye intermediate | Serves as a raw material for synthesizing azo dyes (e.g., acid dyes, direct dyes) and organic pigments (e.g., Lithol Rubine R) via diazotization, coupling, and introduction of naphthalene sulfonic acid groups. |
| Dyes and Pigments Industry | Dye dispersant and leveling agent | Condensed with formaldehyde to produce naphthalene sulfonate formaldehyde condensates (dispersant NNO), used for dispersing vat dyes and disperse dyes, and for leveling acid dyes. |
| Pharmaceutical Industry | Pharmaceutical synthesis intermediate | Employed in the synthesis of anti-rheumatic and anti-inflammatory analgesics (e.g., naproxen) and other naphthalene-ring-containing drug molecules via sulfonyl chloride or sulfonamide formation reactions. |
| Construction Materials Industry | High-range water reducer | Condensed with formaldehyde to produce naphthalene-based high-range water reducers (naphthalene sulfonate formaldehyde condensates), which adsorb onto cement particle surfaces during concrete mixing and disperse particles via electrostatic repulsion. |
| Photographic Materials Industry | Color developer intermediate | Used in synthesizing color developers and coupler components, contributing to the formation of organic compounds with specific optical properties. |
| Organic Synthesis Industry | Rubber additive | Applied in synthesizing rubber scorch inhibitors (e.g., scorch inhibitor NA) and other rubber processing additives. |
Manufacturing Quality Control of Naphthalene-2-sulfonic acid
| Test Item | Common Testing Methods | Method Overview |
|---|---|---|
| Appearance | Visual Inspection | Observe the color, physical state, and presence of impurities. 2-Naphthalenesulfonic acid typically appears as white to pale yellow crystals or powder. |
| Melting Point | Capillary Melting Point Determination | Use a melting point apparatus to determine the sample's melting temperature and compare it with the standard value (approximately 128–130°C) to assess purity. |
| Content Determination | Acid-Base Titration | Titrate an aqueous solution of 2-naphthalenesulfonic acid with a standardized sodium hydroxide solution, using phenolphthalein as an indicator, to calculate the content of active ingredient. |
| Purity Analysis | High-Performance Liquid Chromatography (HPLC) | Use a C18 chromatographic column with a UV detector (e.g., at 254 nm) to quantify the main component and impurities based on retention time and peak area. |
| Water Content | Karl Fischer Titration | Use a Karl Fischer titrator to precisely determine the moisture content in the sample; suitable for organic sulfonic acids with low water content. |
| Sulfonic Acid Group Content | Neutralization Titration or Elemental Analysis | Determine total acidity via titration or measure sulfur content using an elemental analyzer to indirectly calculate the sulfonic acid group content. |
| Heavy Metal Content | Atomic Absorption Spectroscopy (AAS) or ICP-MS | After sample digestion, measure residual heavy metals such as lead, arsenic, mercury, and cadmium to ensure compliance with safety standards. |
| Organic Impurities | Gas Chromatography-Mass Spectrometry (GC-MS) or HPLC-MS | Analyze possible residual raw materials (e.g., naphthalene), intermediates, or by-products to identify and quantify trace organic impurities. |
| pH Value (Aqueous Solution) | pH Meter Measurement | Prepare an aqueous solution at a specific concentration (e.g., 1%) and measure its acidity or alkalinity using a calibrated pH meter. |
| Residue on Ignition | Gravimetric Method | Ignite the sample at high temperature and weigh the residual residue to assess the content of inorganic impurities. |
Technical Specifications of Naphthalene-2-sulfonic acid
| Test Item | Specification |
|---|---|
| Appearance | White to off-white crystalline powder |
| Purity | >=98.5% |
| Melting Point | 160-164°C |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=1.2% |
| Single Impurity | <=0.3% |
| 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 Naphthalene-2-sulfonic acid
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| Lot/Batch Number | *Required fields | |
NMR Spectra of Naphthalene-2-sulfonic acid
Packaging of Naphthalene-2-sulfonic acid
Industrial Naphthalene-2-sulfonic 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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