China Factory Direct
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| CAS number | 130-13-2 |
| Product name | Sodium 4-amino-1-naphthalenesulfonate |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Material GradeSpecialty GradeIndustrial GradeReagent 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) |
Based on current marketvolatility and material availability.
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
| Industry | Application | Process |
|---|---|---|
| Dye Industry | Intermediate for azo dye production | Used in the synthesis of direct dyes, acid dyes, etc., via diazotization followed by coupling with phenols or amines to form colored compounds |
| Textile Industry | Raw material for dyeing auxiliaries | Employed as a dye component in dyeing processes for cellulosic, silk, and wool fibers to enhance dye affinity and color fastness |
| Paper Industry | Pigment production | Applied in manufacturing water-soluble dyes for paper coloring, enabling uniform dyeing during the papermaking process |
| Leather Industry | Leather dyeing | Involved in synthesizing azo dyes suitable for leather dyeing to improve leather coloration and lightfastness |
| Chemical Reagents | Preparation of analytical reagents | Utilized in laboratory synthesis of reagents for chromogenic reactions, such as precursors for indicators in metal ion detection |
| Test Item | Common Testing Method | Method Overview |
|---|---|---|
| Appearance | Visual Inspection | Observe the color and condition of the sample under natural light or standard light sources to determine if it is a white to pale yellow crystalline powder, and check for clumping, impurities, etc. |
| Content Determination | HPLC (High-Performance Liquid Chromatography) | Use a reverse-phase C18 column with methanol-buffer solution as the mobile phase, detect using a UV detector (e.g., 254 nm), and calculate the main component content using the external standard method. |
| Related Substances (Impurities) | HPLC (High-Performance Liquid Chromatography) | As above, detect impurity peaks separated from the main peak, calculate the content of each impurity and total impurities, and evaluate purity. |
| Dry Loss | TGA (Thermogravimetric Analysis) or Oven Method | Weigh the sample until constant weight is achieved at 105°C, and calculate the water and other volatile substances content based on the mass loss. |
| Residual Ash (Sulfate Ash) | Gravimetric Method | Weigh the residual inorganic matter after high-temperature incineration of the sample, and calculate the content of sulfate and other inorganic impurities. |
| pH Value | pH Meter Measurement | Dissolve a certain concentration of the sample in water (e.g., 1% w/v), then measure the pH value using a calibrated pH meter. |
| Solubility | Solubility Test | Take a small amount of the sample and add it to water, ethanol, or other solvents to observe its solubility and verify whether it meets the specified solubility performance. |
| Heavy Metal Content | AAS (Atomic Absorption Spectroscopy) or ICP-MS | Digest the sample and measure the residual amounts of heavy metals such as lead, arsenic, cadmium, and mercury to ensure compliance with pharmacopoeia or safety standards. |
| Melting Point | Melting Point Determination (Capillary Method) | Use a melting point apparatus to determine the temperature range from the start of melting to complete melting, used for identification and initial purity assessment. |
| Test Item | Specification |
|---|---|
| Appearance | White to off-white crystalline powder |
| Purity | >=98.0% (HPLC) |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Residue on Ignition | <=0.1% |
| Heavy Metals | <=10 ppm |
| Melting Point | 275-285 °C (decomposes) |
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| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
| Pictograms | ![]() |
| Signal Word | Warning |
| Safety Data Sheet | |
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.