PYRIDINE-3,4-DICARBOXYLIC ANHYDRIDE Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 4664-08-8 |
| Product name | PYRIDINE-3,4-DICARBOXYLIC ANHYDRIDE |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Agricultural GradePharmaceutical GradeMaterial GradeSpecialty GradeIndustrial 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 PYRIDINE-3,4-DICARBOXYLIC ANHYDRIDE
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk PYRIDINE-3,4-DICARBOXYLIC ANHYDRIDE Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of PYRIDINE-3,4-DICARBOXYLIC ANHYDRIDE
| Industry | Application | Process |
|---|---|---|
| Pharmaceuticals | Used in the synthesis of certain pharmaceutical intermediates | Reacted with specific amines to generate target compounds |
| Agrochemicals | Serves as a raw material for synthesizing herbicides and other pesticides | Incorporated into final products via acylation, cyclization, or similar reactions |
| Fine Chemicals | Acts as a starting material for preparing dyes, pigments, and other fine chemicals | Combined with other molecules via esterification, amidation, or analogous reactions to form complex structures |
| Materials Science | Involved in the preparation of functional polymeric materials, such as heat-resistant resins | Forms network structures through polymerization or crosslinking processes |
| Biotechnology | Under investigation as a potential therapeutic agent in biomedical applications | Modifies biologically active molecules to enhance performance or specificity |
Manufacturing Quality Control of PYRIDINE-3,4-DICARBOXYLIC ANHYDRIDE
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantitative determination using reversed-phase HPLC with UV detection at 254 nm, comparing peak area against a certified reference standard. |
| Moisture Content | Karl Fischer Titration | Electrochemical titration based on the reaction of iodine with water in a methanol-based reagent, measuring endpoint potentiometrically. |
| Residue on Ignition | Gravimetric Analysis | Heating sample to 700-800 C in a platinum crucible until constant weight; residue mass expressed as percentage of original sample. |
| Heavy Metals (as Pb) | ICP-OES | Multi-element quantification after acid digestion, using plasma excitation and optical emission detection at element-specific wavelengths. |
| Chloride Impurity | Ion Chromatography | Separation of anions on an ion-exchange column with conductivity detection, comparing chloride peak area to calibration standards. |
| Sulfate Impurity | Turbidimetric Method | Precipitation of sulfate as barium sulfate in acidic medium; quantification via measurement of turbidity at 420 nm. |
| Related Substances | HPLC-DAD | Identification and quantification of impurities using HPLC with diode array detection and spectral library matching. |
| Melting Point | Capillary Melting Point Apparatus | Determination of temperature range at which solid transitions to liquid, observed visually under controlled heating rate. |
| Appearance | Visual Inspection | Assessment of physical state, color, and presence of foreign particles against established reference standards under controlled lighting. |
| Solubility in Common Solvents | Qualitative Solubility Test | Observation of complete dissolution in specified solvents (e.g., acetone, DMF) at room temperature within defined time. |
| Acid Value | Acid-Base Titration | Neutralization of acidic functional groups with standardized KOH solution using phenolphthalein indicator; calculation based on KOH consumption. |
| Loss on Drying | Thermogravimetric Analysis (TGA) | Measurement of mass loss upon heating from 25 C to 105 C under nitrogen; reported as percentage weight loss. |
Technical Specifications of PYRIDINE-3,4-DICARBOXYLIC ANHYDRIDE
| Test Item | Specification |
|---|---|
| Appearance | Pale-brown solid |
| Purity | >=98.0% (GC-MS) |
| Melting Point | 172–176°C |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Water Content (KF) | <=0.5% |
| 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 PYRIDINE-3,4-DICARBOXYLIC ANHYDRIDE
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of PYRIDINE-3,4-DICARBOXYLIC ANHYDRIDE
Safety Information of PYRIDINE-3,4-DICARBOXYLIC ANHYDRIDE
| Pictograms |  |
| Signal Word | Warning |
| Safety Data Sheet | |
Packaging of PYRIDINE-3,4-DICARBOXYLIC ANHYDRIDE
Industrial PYRIDINE-3,4-DICARBOXYLIC ANHYDRIDE 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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