2,3-Pyrazinecarboxylic anhydride Bulk Supply for Industrial Use
China Factory Direct
 |
|
| CAS number | 4744-50-7 |
| Product name | 2,3-Pyrazinecarboxylic anhydride |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Agricultural 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) |
QUOTE TYPE
PACKAGING TYPE
TOTAL QUANTITY(KG)
PREFERRED SHIPPING METHOD
YOUR COMPANY
YOUR E-MAIL
Calculate Summary
Based on current marketvolatility and material availability.
Documents We Provide for 2,3-Pyrazinecarboxylic anhydride
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 2,3-Pyrazinecarboxylic anhydride Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 2,3-Pyrazinecarboxylic anhydride
| Industry | Application | Process |
|---|---|---|
| Pharmaceuticals | Key intermediate for synthesizing antitubercular drugs (e.g., pyrazinamide) | Used to construct the pyrazine ring structure via condensation with ammonia or amines, followed by reduction or hydrolysis |
| Pesticides | Used to synthesize pyrazine-containing herbicides and fungicides | Applied as a heterocyclic scaffold precursor in nucleophilic substitution or coupling reactions to introduce active functional groups |
| Materials Science | Monomer for preparing high-performance polymers (e.g., polyimides) | Applied in condensation polymerization with diamines to produce thermally stable, high-strength polymeric materials |
| Dyes & Pigments | Synthesis of specific pyrazine-based fluorescent dyes or functional colorants | Used in acylation or condensation reactions to incorporate chromophores and tailor optical properties |
Manufacturing Quality Control of 2,3-Pyrazinecarboxylic anhydride
| Test Item | Common Testing Method | Method Overview |
|---|---|---|
| Appearance | Visual Inspection | Observe the color, condition, and presence of impurities under natural light or standard light source. 2,3-pyrazinedicarboxylic anhydride is typically a white to off-white crystalline powder. |
| Melting Point | Capillary Melting Point Determination | Determine the melting range using a melting point apparatus or capillary method to assess purity and consistency. The typical melting range is approximately 138–142 °C. |
| Purity (Content) | High-Performance Liquid Chromatography (HPLC) | Use a reversed-phase C18 column with methanol-water or acetonitrile-water as the mobile phase, and a UV detector (e.g., 254 nm) for detection. Calculate the main component content using external standard or area normalization methods. |
| Dry Loss | Thermogravimetric Analysis (TGA) or Constant Weight Drying Method | Dry the sample at a specified temperature (e.g., 105 °C) until constant weight is achieved, and calculate the percentage of mass loss to evaluate moisture and volatile impurities. |
| Residue on Ignition | High-Temperature Combustion Method | Weigh the residue after burning the sample at high temperature (typically 700–800 °C), used to control the total amount of inorganic impurities. |
| pH Value | pH Meter Measurement Method | Prepare a solution of a certain concentration (e.g., 1%) and measure its acidity or alkalinity using a calibrated pH meter, reflecting the acidity from the hydrolysis of the anhydride. |
| Related Substances (Impurities) | High-Performance Liquid Chromatography (HPLC) | Use gradient or isocratic elution programs to separate and quantify possible by-products or degraded impurities (e.g., 2,3-pyrazinedicarboxylic acid), usually setting impurity limits (e.g., single impurity ≤0.5%, total impurities ≤1.0%). |
| Infrared Spectroscopy Identification | Fourier Transform Infrared Spectroscopy (FT-IR) | Prepare a KBr pellet or ATR sample and measure characteristic absorption peaks (e.g., carbonyl C=O stretching vibrations around 1800 cm⁻¹ and 1760 cm⁻¹) for structural confirmation and authenticity identification. |
| Proton Nuclear Magnetic Resonance (¹H NMR) | Nuclear Magnetic Resonance Spectroscopy | Dissolve in deuterated solvents (e.g., DMSO-d₆) and measure characteristic proton chemical shifts (e.g., hydrogen signals on the pyrazine ring around δ 8.5–9.0 ppm) for structural confirmation and high-purity verification. |
Technical Specifications of 2,3-Pyrazinecarboxylic anhydride
| Test Item | Specification |
|---|---|
| Appearance | Pale-brown solid |
| Purity | >=98.5% (by LC-MS) |
| Melting Point | 172–176 °C |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.3% |
| Heavy Metals | <=10 ppm |
| Residue on Ignition | <=0.1% |
Specifications vary by industry. Reach out to our technical experts for a COA tailored specifically to your application. Email:selse@GRchemical.com
|
|
Download COA of 2,3-Pyrazinecarboxylic anhydride
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of 2,3-Pyrazinecarboxylic anhydride
Safety Information of 2,3-Pyrazinecarboxylic anhydride
| Pictograms |  |
| Signal Word | Warning |
| Safety Data Sheet | |
Packaging of 2,3-Pyrazinecarboxylic anhydride
Industrial 2,3-Pyrazinecarboxylic 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.
Use Bulk
Supply Factory
Direct ISO 9001
Certified Samples
Available Stable
Supply