1-Diazo-2-naphthol-4-sulfonic acid Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 887-76-3 |
| Product name | 1-Diazo-2-naphthol-4-sulfonic acid |
| 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 1-Diazo-2-naphthol-4-sulfonic acid
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 1-Diazo-2-naphthol-4-sulfonic acid Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 1-Diazo-2-naphthol-4-sulfonic acid
| Industry | Application | Process |
|---|---|---|
| Dye Manufacturing | Intermediate for azo dyes, used in the synthesis of acid, direct, and reactive dyes | Diazotized and then coupled with aromatic amines or phenolic compounds to produce colored azo dyes |
| Textile Printing & Dyeing | Preparation of red, orange, and brown dye series for dyeing wool, silk, and cotton fibers | Coupling reaction carried out in weakly acidic or neutral medium, followed by purification, salting-out, and standardization |
| Paper Industry | Dye component for paper coloration | Applied in the wet-end or surface-sizing stage of papermaking, in combination with cationic fixing agents |
| Leather Industry | Post-tanning dyeing aid to improve dye leveling and fastness | Binds to collagen fibers in a pH 4–6 buffered system, used synergistically with metal-complex dyes |
Manufacturing Quality Control of 1-Diazo-2-naphthol-4-sulfonic acid
| Test Item | Common Testing Methods | Method Overview |
|---|---|---|
| Appearance and Physical Characteristics | Visual inspection, microscopic observation | Observe the sample's color, morphology, crystalline state, and other physical properties using the naked eye or microscope to determine if they meet standard specifications. |
| Purity | High-Performance Liquid Chromatography (HPLC) | Separate sample components using a reversed-phase chromatographic column; quantify the main component peak area via UV detector and calculate purity percentage. |
| Assay | Ultraviolet-Visible Spectrophotometry (UV-Vis) | Measure absorbance at a specific wavelength (e.g., 480–520 nm) and calculate concentration based on a standard curve or molar absorptivity coefficient. |
| Structural Confirmation | Fourier Transform Infrared Spectroscopy (FT-IR), Nuclear Magnetic Resonance (NMR) | FT-IR identifies characteristic functional group absorption peaks; ¹H/¹³C NMR confirms molecular structure and substitution patterns, verifying consistency of chemical structure. |
| Moisture Content | Karl Fischer Titration | Determine trace moisture in the sample using volumetric or coulometric methods to assess drying level and stability. |
| Residue on Ignition / Inorganic Impurities | Gravimetric Method (High-Temperature Ignition) | Ignite the sample at high temperature (e.g., 600–800°C) until constant weight; weigh the residue to calculate inorganic impurity content. |
| pH Value | pH Meter Measurement | Prepare an aqueous solution of the sample at a defined concentration and measure its acidity or alkalinity using a calibrated pH meter to evaluate product stability. |
| Heavy Metal Limits | Atomic Absorption Spectroscopy (AAS) or ICP-MS | Digest the sample and analyze for heavy metal elements such as lead, cadmium, mercury, and arsenic to ensure compliance with pharmacopoeial or industry safety limits. |
| Solubility | Solubility Test | Observe dissolution rate and clarity in specified solvents (e.g., water, ethanol) to assess suitability for processing and compatibility with formulations. |
| Stability (Accelerated/Long-term) | Accelerated Stability Testing | Periodically sample under elevated temperature and humidity conditions (e.g., 40°C/75% RH), monitor content changes using HPLC or UV to predict shelf life. |
Technical Specifications of 1-Diazo-2-naphthol-4-sulfonic acid
| Test Item | Specification |
|---|---|
| Appearance | Brown powder |
| Purity | >=98.0% (HPLC) |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Melting Point | 245-249°C |
| Heavy Metals | <=10 ppm |
| Residue on Ignition | <=0.3% |
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 1-Diazo-2-naphthol-4-sulfonic acid
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of 1-Diazo-2-naphthol-4-sulfonic acid
Safety Information of 1-Diazo-2-naphthol-4-sulfonic acid
| Pictograms |   |
| Signal Word | Danger |
| Safety Data Sheet | |
Packaging of 1-Diazo-2-naphthol-4-sulfonic acid
Industrial 1-Diazo-2-naphthol-4-sulfonic 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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