6,6'-Ureylene-bis(1-naphthol-3-sulfonic acid) Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 134-47-4 |
| Product name | 6,6'-Ureylene-bis(1-naphthol-3-sulfonic acid) |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Industrial 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 6,6'-Ureylene-bis(1-naphthol-3-sulfonic acid)
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 6,6'-Ureylene-bis(1-naphthol-3-sulfonic acid) Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 6,6'-Ureylene-bis(1-naphthol-3-sulfonic acid)
| Industry | Application | Process |
|---|---|---|
| Dye Industry | Used in the manufacture of acid dyes (e.g., Acid Red 88) and mordant dyes | Coupling reaction |
| Dye Industry | Serves as an intermediate in the synthesis of reactive dyes (e.g., Reactive Red 2) | Condensation reaction |
| Dye Industry | Used in the production of direct dyes and chrome mordant dyes | Diazotization and coupling |
| Pigment Industry | Used in the synthesis of red organic pigments (e.g., Pigment Red 49) | Coupling reaction |
| Chemical Analysis | Used as a colorimetric reagent and indicator for metal ion analysis | Dissolution and color development |
Manufacturing Quality Control of 6,6'-Ureylene-bis(1-naphthol-3-sulfonic acid)
| Test Item | Common Testing Method | Method Overview |
|---|---|---|
| Identification Test | Ultraviolet-Visible Spectrophotometry (UV-Vis) | Determine the maximum absorption peak within a specific wavelength range (e.g., 425–435 nm) and compare the characteristic absorption spectrum with that of a reference standard. |
| Thin-Layer Chromatography (TLC) | Spot sample and reference standard on a silica gel plate, develop the chromatogram, and identify by comparing the Rf values of the spots after visualization. | |
| Purity and Assay | High-Performance Liquid Chromatography (HPLC) | Use a reversed-phase C18 column with a mobile phase of methanol and acetate buffer; quantify the main component using a UV detector and calculate purity. |
| Detection of Harmful Aromatic Amines | Gas Chromatography-Mass Spectrometry (GC-MS) | Detect whether restricted aromatic amines (e.g., aniline, β-naphthylamine) are released after reductive cleavage to assess safety. |
| Heavy Metal Content | Atomic Absorption Spectroscopy (AAS) or ICP-MS | Determine residual levels of heavy metals such as lead (Pb), arsenic (As), mercury (Hg), and cadmium (Cd) to ensure compliance with food safety standards. |
| Loss on Drying | Thermogravimetric Analysis (Oven Method) | Dry the sample at a specified temperature (e.g., 105°C) to constant weight and calculate the mass loss to control moisture and volatile content. |
| Sulfated Ash / Residue on Ignition | Gravimetric Method | Weigh the inorganic residue remaining after high-temperature ignition of the sample to estimate inorganic impurity content. |
| pH Value | pH Meter Method | Dissolve the sample in water and directly measure the pH using a calibrated pH meter; typically required to be within the range of 3.0–5.0. |
| Microbial Limits | Microbiological Culture Method | Test for total bacterial count, molds, yeasts, and pathogenic microorganisms (e.g., E. coli, Salmonella) according to pharmacopoeia or food safety standards. |
| Maximum Absorption Wavelength and Absorptivity | Spectrophotometry | Measure absorbance at the maximum absorption wavelength and calculate molar absorptivity to verify dye strength and batch-to-batch consistency. |
Technical Specifications of 6,6'-Ureylene-bis(1-naphthol-3-sulfonic acid)
| Test Item | Specification |
|---|---|
| Appearance | Red crystalline powder |
| Purity | >=98.5% |
| Melting Point | 240-244°C |
| Total Impurities | <=1.0% |
| Water Content (KF) | <=0.5% |
| Residue on Ignition | <=0.1% |
| Heavy Metals | <=10 ppm |
| Color (APHA/Pt-Co) | <=100 |
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 6,6'-Ureylene-bis(1-naphthol-3-sulfonic acid)
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of 6,6'-Ureylene-bis(1-naphthol-3-sulfonic acid)
Packaging of 6,6'-Ureylene-bis(1-naphthol-3-sulfonic acid)
Industrial 6,6'-Ureylene-bis(1-naphthol-3-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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