Sodium 2-naphthol-7-sulfonate Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 135-55-7 |
| Product name | Sodium 2-naphthol-7-sulfonate |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeIndustrial GradeSpecialty 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) |
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Documents We Provide for Sodium 2-naphthol-7-sulfonate
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Sodium 2-naphthol-7-sulfonate Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Sodium 2-naphthol-7-sulfonate
| Industry | Application | Process |
|---|---|---|
| Dye Industry | Intermediate for azo dye synthesis | Applied in diazotization and coupling reactions |
| Pharmaceutical Industry | Intermediate for drug synthesis | Applied in organic synthesis reactions |
| Analytical Chemistry | Colorimetric reagent for metal ion complexation | Applied in spectrophotometric analysis |
| Textile Dyeing and Printing | Mordant or auxiliary dye component | Formulation of dyeing auxiliaries |
Manufacturing Quality Control of Sodium 2-naphthol-7-sulfonate
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | Acid-Base Titration | Quantifies active ingredient by titration with standardized HCl using methyl orange indicator. |
| Moisture Content | Karl Fischer Titration | Determines water content via coulometric or volumetric reaction between water and Karl Fischer reagent. |
| pH of Aqueous Solution | Potentiometric pH Measurement | Measures hydrogen ion activity using calibrated glass electrode in 1% w/v aqueous solution. |
| Heavy Metals (as Pb) | Atomic Absorption Spectroscopy (AAS) | Quantifies total heavy metals after wet digestion by measuring absorbance at characteristic wavelengths. |
| Sulfate (SO4) Impurity | Gravimetric Analysis | Precipitates sulfate as BaSO4 and determines mass after ignition and drying. |
| Chloride (Cl) Impurity | Argentometric Titration | Titration with standardized AgNO3 using potassium chromate indicator to detect endpoint. |
| Iron (Fe) Content | UV-Vis Spectrophotometry | Measures Fe(II)-1,10-phenanthroline complex absorbance at ~510 nm after reduction and chelation. |
| Organic Impurities (Related Substances) | HPLC with UV Detection | Separates and quantifies impurities using reversed-phase C18 column and UV detection at 254 nm. |
| Color (APHA) | Visual Comparison or Photometric Measurement | Compares sample solution color intensity against platinum-cobalt standard solutions. |
| Residue on Ignition | Gravimetric Analysis | Measures non-volatile inorganic residue after incineration at 700-800 C. |
| Sodium Content | Flame Photometry | Quantifies Na+ by measuring characteristic emission intensity at 589 nm in flame. |
| Water Insolubles | Filtration and Gravimetry | Determines insoluble matter by filtration through pre-weighed sintered glass crucible and drying to constant weight. |
Technical Specifications of Sodium 2-naphthol-7-sulfonate
| Test Item | Specification |
|---|---|
| Appearance | Off-white powder |
| Purity(HPLC) | min. 96.0 % |
| Water | max. 8.0 % |
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 Sodium 2-naphthol-7-sulfonate
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of Sodium 2-naphthol-7-sulfonate
Packaging of Sodium 2-naphthol-7-sulfonate
Industrial Sodium 2-naphthol-7-sulfonate 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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