HYDROXYNAPHTHOL BLUE Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 63451-35-4 |
| Product name | HYDROXYNAPHTHOL BLUE |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Industrial Grade |
| Packaging | 25KG/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 HYDROXYNAPHTHOL BLUE
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk HYDROXYNAPHTHOL BLUE Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of HYDROXYNAPHTHOL BLUE
| Industry | Application | Process |
|---|---|---|
| Analytical Chemistry | Complexometric indicator for metal ions (e.g., Ca²⁺, Mg²⁺, Zn²⁺) in EDTA titrations | Used as a complexometric titration endpoint indicator in a pH-buffered solution, with color change from blue to pink |
| Water Quality Analysis | Detection of hardness ions (e.g., Ca²⁺, Mg²⁺) in water samples | Applied as a colorimetric reagent in titration analysis for quantitative determination of water hardness |
Manufacturing Quality Control of HYDROXYNAPHTHOL BLUE
| Test Item | Common Testing Method | Method Overview |
|---|---|---|
| Appearance | Visual Inspection | Observe the color and state of the sample. Qualified products should appear as purplish-red or dark red powder with no visible impurities. |
| Melting Point | Capillary Melting Point Determination | Determine the melting temperature range using a melting point apparatus. Hydroxynaphthol Blue typically decomposes around 220–230°C, which can be used to assess purity. |
| Content Determination | UV-Visible Spectrophotometry (UV-Vis) | Determine the absorbance of the solution at a specific wavelength (e.g., around 560 nm), and calculate the content of the main component using a standard curve. |
| Maximum Absorption Wavelength (λmax) | UV-Visible Spectroscopy Scan | Scan the range of 200–700 nm in water or buffer solution to confirm the position of the maximum absorption peak, which should be consistent with the standard (around 550–570 nm). |
| pH Indication Test | Acid-Base Titration Colorimetry | Dissolve the sample in different pH buffer solutions and observe the color change (red → blue), verifying its indication function within the pH range of 7.0–8.5. |
| Drying Loss | Drying Method (Thermogravimetric Analysis) | Dry the sample at 105°C until constant weight is achieved, and calculate the percentage of loss to control moisture and other volatile impurities. |
| Residue on Ignition | Gravimetric Method | Weigh the residue after high-temperature ignition of the sample to evaluate the content of inorganic impurities. |
| Heavy Metal Content | Atomic Absorption Spectrometry (AAS) or ICP-MS | Dissolve the sample and determine the content of heavy metals such as lead, mercury, and cadmium to ensure compliance with reagent-grade or pharmacopoeia standards. |
| Related Substances/Purity | HPLC (High-Performance Liquid Chromatography) | Use a reverse-phase C18 column with a UV detector to detect the main peak and impurity peaks, assessing purity and potential synthetic by-products. |
Technical Specifications of HYDROXYNAPHTHOL BLUE
| Test Item | Specification |
|---|---|
| Appearance | Dark purple crystalline powder |
| Purity | >=98.5% |
| Water Content (KF) | <=0.5% |
| Melting Point | 245-250°C (decomposes) |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Heavy Metals | <=20 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 HYDROXYNAPHTHOL BLUE
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of HYDROXYNAPHTHOL BLUE
Packaging of HYDROXYNAPHTHOL BLUE
Industrial HYDROXYNAPHTHOL BLUE 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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