7-Anilino-4-hydroxy-2-naphthalenesulfonic acid Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 119-40-4 |
| Product name | 7-Anilino-4-hydroxy-2-naphthalenesulfonic acid |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeIndustrial GradeSpecialty GradeCosmetic GradeFood 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 7-Anilino-4-hydroxy-2-naphthalenesulfonic acid
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 7-Anilino-4-hydroxy-2-naphthalenesulfonic acid Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 7-Anilino-4-hydroxy-2-naphthalenesulfonic acid
| Industry | Application | Process |
|---|---|---|
| Dye Industry | Intermediate | Used in the synthesis of dyes, particularly direct and acid dyes |
| Pharmaceutical Industry | Intermediate | Used in the synthesis of certain pharmaceuticals, such as anti-inflammatory agents |
| Textile Industry | Dyeing | Applied as a dye component in textile dyeing processes |
| Printing Ink | Pigment Intermediate | Used in the manufacture of inks with specific colors |
| Cosmetics | Colorant Intermediate | Used in the synthesis of colorants for certain cosmetic products |
Manufacturing Quality Control of 7-Anilino-4-hydroxy-2-naphthalenesulfonic acid
| Test Item | Common Test Method | Method Overview |
|---|---|---|
| Appearance | Visual Inspection | Observe the color, physical state, and presence of visible impurities under natural or standard lighting. Typically appears as a pale yellow to brownish-yellow powder or crystalline solid. |
| Purity | High-Performance Liquid Chromatography (HPLC) | Uses a reversed-phase C18 column with a mobile phase of methanol and buffer (e.g., phosphate buffer), and a UV detector (254 nm or set at the compound’s maximum absorption wavelength). Purity is calculated using peak area normalization or external standard method. |
| Related Substances / Impurities | HPLC Method | Same conditions as purity testing; detects potential impurities such as synthesis intermediates (e.g., unreacted naphthol, aniline derivatives) or degradation products. Assesses total impurity levels and individual impurity limits. |
| Melting Point | Capillary Melting Point Determination | Determine the melting temperature range using a melting point apparatus at a specified heating rate. Used for preliminary assessment of compound purity and consistency. Typical melting range should be referenced against literature or standard sample data. |
| Moisture Content | Karl Fischer Titration | Quantitative determination of water content using Karl Fischer reagent. Suitable for quality control of hygroscopic compounds containing sulfonic acid groups. |
| Sulfonate Content | Non-aqueous Titration or Ion Chromatography | Non-aqueous titration: Titrating sulfonic acid groups with standard base in non-aqueous solvent. Ion chromatography directly measures free sulfonate ions, indirectly verifying structural integrity. |
| Heavy Metals | Atomic Absorption Spectroscopy (AAS) or ICP-MS | After sample digestion, determine residual levels of heavy metals such as lead, arsenic, mercury, and cadmium to ensure compliance with pharmaceutical or industrial safety standards. |
| Loss on Drying | Thermogravimetric Analysis (TGA) or Oven Method | Weigh loss after drying at a specified temperature (e.g., 105°C) for a certain period, used to evaluate volatile components or residual solvents. |
| Sulfated Ash / Residue on Ignition | Sulfated Residue Method | Sample is charred, treated with sulfuric acid, then ignited at high temperature. The weight of inorganic residue is measured to control total inorganic impurities. |
| Structural Confirmation (Identification) | Fourier Transform Infrared Spectroscopy (FTIR), Nuclear Magnetic Resonance (¹H NMR, ¹³C NMR), Mass Spectrometry (MS) | FTIR compares characteristic functional group absorptions (e.g., —OH, —NH, sulfonic acid); NMR confirms molecular framework and substitution patterns; MS provides molecular ion peak and fragmentation information. Combined for full structural verification. |
Technical Specifications of 7-Anilino-4-hydroxy-2-naphthalenesulfonic acid
| Test Item | Specification |
|---|---|
| Appearance | White to gray or brown crystalline powder |
| Purity | >=98.5% |
| Melting Point | 210–215 °C |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.3% |
| Identification (NMR) | Consistent with structure |
| Identification (IR) | Consistent with structure |
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 7-Anilino-4-hydroxy-2-naphthalenesulfonic acid
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of 7-Anilino-4-hydroxy-2-naphthalenesulfonic acid
Safety Information of 7-Anilino-4-hydroxy-2-naphthalenesulfonic acid
| Pictograms |  |
| Signal Word | Warning |
| Safety Data Sheet | |
Packaging of 7-Anilino-4-hydroxy-2-naphthalenesulfonic acid
Industrial 7-Anilino-4-hydroxy-2-naphthalenesulfonic 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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