Naphthol AS-D Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 135-61-5 |
| Product name | Naphthol AS-D |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Material 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) |
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Documents We Provide for Naphthol AS-D
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Naphthol AS-D Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Naphthol AS-D
| Industry | Application | Process |
|---|---|---|
| Textile Dyeing and Printing | Dyeing and printing of cellulose fibers, including cotton, linen, and viscose | Ice dyeing (diazotization–coupling reaction): coupling with diazo components at 0–5°C to form insoluble azo dyes deposited in situ on fibers |
| Coatings | Production of organic pigments for ink, paint, and plastic coloration | Used as a coupling component to react with aromatic diazonium salts, forming lake-type azo pigments (e.g., Pigment Red 176); surface-treated for use in high-performance printing inks and engineering plastics |
| Papermaking | Paper coloring and anti-counterfeiting marking | In situ coupling dyeing during pulp processing or paper surface sizing, delivering lightfast and washfast coloration; some grades employed in visible/invisible anti-counterfeiting systems for security papers |
Manufacturing Quality Control of Naphthol AS-D
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantification based on peak area comparison against a certified reference standard using reversed-phase chromatography and UV detection at 254 nm. |
| Moisture Content | Karl Fischer Titration | Electrochemical titration where iodine reacts stoichiometrically with water in a methanol-based solvent system. |
| Residue on Ignition | Gravimetric Analysis | Mass of non-volatile inorganic residue determined after high-temperature ashing at 750-800 C. |
| Heavy Metals (as Pb) | AAS (Flame or Graphite Furnace) | Atomic absorption spectroscopy measuring absorbance of ground-state atoms vaporized in flame or graphite furnace. |
| Chloride Impurity | Potentiometric Titration with AgNO3 | Titration using silver nitrate with silver indicator electrode; endpoint detected by potential change due to AgCl precipitation. |
| Sulfated Ash | Gravimetric Analysis | Weight of residue after ignition with sulfuric acid treatment, indicating inorganic sulfate-forming impurities. |
| Melting Point | Capillary Melting Point Apparatus | Thermal transition observed as the temperature range at which solid phase converts to liquid under controlled heating. |
| Organic Volatile Impurities | GC-FID | Separation and quantification of volatile organic compounds using gas chromatography with flame ionization detection. |
| Iron Content | ICP-OES | Elemental quantification via emission intensity of excited iron atoms in high-temperature argon plasma. |
| pH of Aqueous Suspension | pH Meter Measurement | Electrochemical measurement of hydrogen ion activity in a defined suspension (e.g., 1% w/v in water). |
| Particle Size Distribution | Laser Diffraction | Analysis of light scattering pattern from dispersed particles to calculate size distribution based on Mie theory. |
| Bulk Density | ASTM D1895 Method A | Mass per unit volume of material poured into a calibrated cylinder under standardized conditions. |
Technical Specifications of Naphthol AS-D
| Test Item | Specification |
|---|---|
| Appearance | White to gray to brown powder or crystals |
| Purity | >=98.0% |
| Total Impurities | <=2.0% |
| Water Content (KF) | <=0.5% |
| Melting Point | 148°C to 152°C |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.1% |
| Identification (NMR) | Conforms to reference standard |
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 Naphthol AS-D
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of Naphthol AS-D
Packaging of Naphthol AS-D
Industrial Naphthol AS-D 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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