China Factory Direct
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| CAS number | 1141-59-9 |
| Product name | 4-(2-PYRIDYLAZO)RESORCINOL |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeMaterial 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) |
Based on current marketvolatility and material availability.
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
| Industry | Application | Process |
|---|---|---|
| Analytical Chemistry | Colorimetric reagent for metal ions | Used in colorimetric determination of metal ions such as copper, cobalt, nickel, and zinc; forms stable colored complexes with metals, followed by absorbance measurement using a spectrophotometer |
| Environmental Monitoring | Heavy metal analysis in water | Applied as a colorimetric reagent to react with heavy metal ions in water samples, followed by liquid–liquid extraction or solid-phase extraction, and quantitative analysis via UV-Vis spectrophotometry |
| Chemical Reagents Manufacturing | Production of high-purity colorimetric reagents | Purification of 4-(2-pyridylazo)-resorcinol via recrystallization or column chromatography to prepare certified reference materials for laboratory analytical reagent kits |
| Materials Science | Functional dye intermediate | Employed as an azo dye precursor in condensation or coupling reactions to synthesize organic materials with photochromic or metal-chelating functionality |
| Biochemistry | Metal ion probe | Utilized as a fluorescence- or colorimetry-based probe in biosensing systems for intracellular or in vitro detection of specific metal ion concentrations |
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantitative determination using reversed-phase HPLC with UV detection at 500 nm, comparing peak area against a certified reference standard. |
| Appearance | Visual Inspection | Assessment of physical state and color against established reference samples under controlled lighting conditions. |
| Melting Point | Capillary Melting Point Apparatus | Determination of temperature range at which solid transitions to liquid, using calibrated capillary apparatus per USP <741>. |
| Loss on Drying | Gravimetric (105 C, 2 h) | Measurement of mass loss after drying under specified temperature and time, indicating volatile content including residual solvents and moisture. |
| Residue on Ignition | Gravimetric (550 C) | Determination of inorganic ash content after high-temperature incineration, reflecting non-volatile impurities. |
| Heavy Metals (as Pb) | AAS (Flame or Graphite Furnace) | Quantification of total heavy metals by atomic absorption spectroscopy after acid digestion and chelation. |
| Chloride Impurity | Ion Chromatography (IC) | Separation and quantification of chloride ions using anion-exchange column with conductivity detection. |
| Sulfate Impurity | Turbidimetry | Measurement of turbidity generated by barium sulfate precipitation in acidic medium. |
| Organic Volatile Impurities | GC-FID | Identification and quantification of residual solvents using gas chromatography with flame ionization detection. |
| Water Content | Karl Fischer Titration | Volumetric or coulometric determination of water based on iodine-sulfur dioxide reaction stoichiometry. |
| Related Substances | HPLC-DAD | Detection and quantification of structurally related impurities using HPLC with diode array detection and peak area comparison. |
| pH of 1% Aqueous Solution | Potentiometric pH Measurement | Determination of hydrogen ion activity in aqueous suspension using calibrated pH electrode and buffer standards. |
| Test Item | Specification |
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| Appearance | Orange to red powder |
| Purity | >=98.0% |
| Melting Point | 195–199 °C |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Water Content (KF) | <=0.5% |
| Heavy Metals | <=20 ppm |
| Residue on Ignition | <=0.1% |
| Identification (IR) | Conforms to reference spectrum |
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| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
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.