Pyromellitic acid Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 89-05-4 |
| Product name | Pyromellitic acid |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Material GradeSpecialty GradeElectronic 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 Pyromellitic acid
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Pyromellitic acid Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Pyromellitic acid
| Industry | Application | Process |
|---|---|---|
| Chemical Materials | Raw material for synthesizing polyimide resins | Used to produce high-performance heat-resistant polymers via condensation polymerization with diamine compounds |
| Aerospace | Preparation of high-temperature composite materials | Used in a two-step condensation polymerization with aromatic diamines to form polyimide films or fibers |
| Electronics Industry | Production of semiconductor encapsulation materials and insulating layers | Employed as a polymeric precursor to manufacture high-temperature-resistant, low-dielectric-constant electronic substrates |
| Petrochemicals | Modifier for catalyst supports | Applied via surface grafting or copolymerization to enhance the thermal stability and selectivity of catalysts |
| Polymer Synthesis | Preparation of specialty engineering plastics | Reacted with diamines to produce polyimide materials exhibiting superior mechanical properties and chemical resistance |
Manufacturing Quality Control of Pyromellitic acid
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | Acid-Base Titration | Quantifies carboxylic acid groups by titration with standardized NaOH solution using phenolphthalein indicator. |
| Moisture Content | Karl Fischer Titration | Measures water content via iodometric reaction where iodine is consumed stoichiometrically by water in methanol-based solvent. |
| Melting Point | Capillary Melting Point Apparatus | Determines temperature range at which solid transitions to liquid, indicating purity and identity. |
| Color | Visual Comparison or Hazen/APHA Color Scale | Compares sample solution color against platinum-cobalt standard solutions to assess degradation or impurities. |
| Residue on Ignition | Gravimetric Analysis | Measures non-volatile inorganic residue after high-temperature ashing and weighing. |
| Heavy Metals | ICP-OES | Quantifies trace metal impurities (e.g., Pb, Fe, Cu) by atomic emission spectroscopy after acid digestion. |
| Chloride Content | Potentiometric Titration with AgNO3 | Measures chloride ions via argentometric titration using silver nitrate and a silver indicator electrode. |
| Sulfated Ash | Gravimetric Analysis | Determines inorganic sulfate residue after combustion with sulfuric acid treatment and final weighing. |
| Organic Impurities (Related Substances) | HPLC-UV | Separates and quantifies structurally related compounds using reversed-phase chromatography and UV detection at 254 nm. |
| Iron Content | AAS | Quantifies iron by measuring atomic absorption of light at 248.3 nm after acid digestion and dilution. |
| Particle Size Distribution | Laser Diffraction | Measures size distribution of solid particles in suspension using angular scattering pattern of laser light. |
| Bulk Density | Graduated Cylinder Method | Determines mass per unit volume by measuring weight of material freely poured into a calibrated cylinder. |
Technical Specifications of Pyromellitic acid
| Test Item | Specification |
|---|---|
| Appearance | White crystalline solid |
| Purity | >=98.0% (HPLC) |
| Melting Point | 286–290 °C |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Residue on Ignition | <=0.1% |
| Acid Value (mg KOH/g) | 640–660 mg KOH/g |
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 Pyromellitic acid
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| Lot/Batch Number | *Required fields | |
NMR Spectra of Pyromellitic acid
Packaging of Pyromellitic acid
Industrial Pyromellitic 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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