Naphthol AS-E Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 92-78-4 |
| Product name | Naphthol AS-E |
| 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-E
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Naphthol AS-E Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Naphthol AS-E
| Industry | Application | Process |
|---|---|---|
| Textile Dyeing & Printing | Developing agent for cotton fiber dyeing | Used in diazotization of azo dyes |
| Printing Inks | Pigment intermediate | Applied in synthesis and compounding processes |
| Pigment Manufacturing | Production of organic pigments | Employed in chemical synthesis and post-treatment processes |
| Paper Industry | Dye for specialty papers | Applied via impregnation or coating processes |
| Leather Processing | Dyeing auxiliary for leather | Used in dyeing and fixation processes |
Manufacturing Quality Control of Naphthol AS-E
| Test Item | Common Testing Method | Method Overview |
|---|---|---|
| Appearance | Visual Inspection | Observe the sample's color, physical state, and presence of impurities under natural light or standard lighting conditions to determine if it is a uniform brown-yellow to dark brown powder. |
| Melting Point | Capillary Melting Point Determination | Determine the melting temperature of C.I. Disperse Dye AS-E using a melting point apparatus. The typical melting range is 185–190°C, used to assess purity. |
| Content (Purity) | High-Performance Liquid Chromatography (HPLC) | Use reversed-phase HPLC with a C18 column as the stationary phase, and methanol-water or acetonitrile-water as the mobile phase. Detect the main peak using UV detection, and calculate content by external standard method. |
| Moisture Content | Karl Fischer Titration | Quantitatively determine the moisture content in the sample using Karl Fischer reagent, suitable for trace moisture analysis to ensure product dryness. |
| Ash Content | Gravimetric Method (Ignition Residue Method) | Incinerate the sample at high temperature in a muffle furnace until constant weight, then weigh the residue to calculate ash percentage, reflecting the level of inorganic impurities. |
| pH Value | pH Meter Measurement | Prepare a suspension or solution of the sample at a specified concentration (e.g., in water or dilute alkali), then measure its acidity or alkalinity using a pH meter. |
| Insoluble Matter | Filtration and Weighing Method | Dissolve the sample in an appropriate solvent (such as hot ethanol or sodium hydroxide solution), filter the insoluble residue, dry, and weigh it to calculate the insoluble matter content. |
| Color Shade and Intensity | Dyeing Comparison Method | Perform dyeing on cotton fabric according to standard procedures using the sample, then compare the color shade and depth (intensity) with a reference standard to evaluate application performance. |
Technical Specifications of Naphthol AS-E
| Test Item | Specification |
|---|---|
| Appearance | Light yellow to yellow crystalline powder |
| Purity | >=98.5% |
| Melting Point | 194–198°C |
| Total Impurities | <=1.2% |
| Water Content (KF) | <=0.5% |
| Residue on Ignition | <=0.3% |
| Heavy Metals | <=20 ppm |
| Solubility | Soluble in hot ethanol and acetone; practically insoluble in water |
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-E
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of Naphthol AS-E
Packaging of Naphthol AS-E
Industrial Naphthol AS-E 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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