4,4'-(Ethyne-1,2-diyl)diphthalic Anhydride Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 129808-00-0 |
| Product name | 4,4'-(Ethyne-1,2-diyl)diphthalic Anhydride |
| 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 4,4'-(Ethyne-1,2-diyl)diphthalic Anhydride
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 4,4'-(Ethyne-1,2-diyl)diphthalic Anhydride Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 4,4'-(Ethyne-1,2-diyl)diphthalic Anhydride
| Industry | Application | Process |
|---|---|---|
| Polymer Materials | Synthesis of polyimide (PI) monomers for high-performance engineering plastics, films, and composites | Used as a dianhydride monomer in condensation polymerization with diamine monomers to produce polyimide |
| Electronics Industry | Manufacturing coverlay and base films for flexible printed circuit boards (FPCs), and alignment layers for liquid crystal displays (LCDs) | Imidization process to form polyimide films exhibiting excellent thermal stability, electrical insulation, and mechanical strength |
| Optoelectronics | Precursor for photosensitive polyimide (PSPI) used in photolithographically patterned insulating and buffer layers | Photolithographic patterning for semiconductor device packaging and insulation |
| Aerospace | High-temperature adhesives, composite matrix resins, or coatings | Thermal curing process leveraging high glass transition temperature and thermal stability |
| Advanced Packaging | Stress-buffering layers and redistribution layers (RDL) in chip-scale packaging (CSP) and wafer-level packaging (WLP) | Film formation via coating, photolithography, and curing processes |
Manufacturing Quality Control of 4,4'-(Ethyne-1,2-diyl)diphthalic Anhydride
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC-UV | Quantitative determination using reverse-phase HPLC with UV detection at 254 nm, comparing peak area against a certified reference standard. |
| Moisture Content | Karl Fischer Titration | Electrochemical titration measuring water content based on the stoichiometric reaction of iodine with water in a methanol-based solvent system. |
| Residue on Ignition | Gravimetric Analysis | Heating sample to 700-800 C in a platinum crucible and measuring mass of non-volatile inorganic residue after cooling. |
| Heavy Metals (as Pb) | ICP-OES | Multi-element quantification of trace metals by plasma excitation and optical emission spectroscopy following acid digestion. |
| Chloride Impurity | Ion Chromatography | Separation and quantification of chloride anions using suppressed conductivity detection after aqueous extraction. |
| Melting Point | Capillary Melting Point Apparatus | Thermal transition measurement via controlled heating of a capillary-packed sample; onset and range indicate purity and identity. |
| Organic Volatile Impurities | GC-FID | Identification and quantification of residual solvents and low-boiling impurities using flame ionization detection after headspace or direct injection. |
| Acid Number | Acid-Base Titration | Neutralization of acidic functional groups (e.g., residual anhydride hydrolysis products) with standardized KOH in isopropanol/water. |
| Particle Size Distribution | Laser Diffraction | Analysis of dry powder dispersion using Mie scattering theory to determine volumetric particle size distribution. |
| Bulk Density | Graduated Cylinder Method | Mass per unit volume measured by gently pouring material into a calibrated cylinder and recording settled volume. |
| Color (APHA) | Visual Comparison or Spectrophotometer | Evaluation of yellowness/browning relative to platinum-cobalt standards using APHA scale, measured at 430 nm if instrumental. |
| Residual Solvent (THF) | GC-FID | Targeted quantification of tetrahydrofuran using calibrated GC-FID with internal standard (e.g., DMF) after sample dissolution. |
Technical Specifications of 4,4'-(Ethyne-1,2-diyl)diphthalic Anhydride
| Test Item | Specification |
|---|---|
| Appearance | White to off-white crystalline powder |
| Purity | >=98.5% |
| Melting Point | 245-249°C |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Water Content (KF) | <=0.5% |
| Residue on Ignition | <=0.3% |
| Acid Value (mg KOH/g) | 280-295 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 4,4'-(Ethyne-1,2-diyl)diphthalic Anhydride
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
Safety Information of 4,4'-(Ethyne-1,2-diyl)diphthalic Anhydride
| Pictograms |  |
| Signal Word | Warning |
| Safety Data Sheet | |
Packaging of 4,4'-(Ethyne-1,2-diyl)diphthalic Anhydride
Industrial 4,4'-(Ethyne-1,2-diyl)diphthalic 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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