Cyclobutane-1,2,3,4-tetracarboxylic dianhydride Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 4415-87-6 |
| Product name | Cyclobutane-1,2,3,4-tetracarboxylic dianhydride |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Industrial GradeMaterial 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 Cyclobutane-1,2,3,4-tetracarboxylic dianhydride
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk Cyclobutane-1,2,3,4-tetracarboxylic dianhydride Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of Cyclobutane-1,2,3,4-tetracarboxylic dianhydride
| Industry | Application | Process |
|---|---|---|
| Electronic Materials | Polyimide precursor for flexible display substrates and dielectric layers in IC packaging | Processed into polyimide films via solution condensation polymerization with diamine monomers, followed by thermal imidization curing |
| Aerospace | Component of high-temperature structural adhesives | Used as an anhydride-type curing agent blended with epoxy resins or aromatic diamines, then heat-cured to form crosslinked networks with high glass transition temperature (Tg > 300 °C) |
| Microelectronics | Key monomer in photosensitive polyimide photoresists | Copolymerized with photosensitive diamines (e.g., diazoquinone-containing diamines), then patterned via UV exposure, development, and thermal curing |
| Specialty Coatings | Raw material for radiation-resistant, low-outgassing insulating coatings | Copolymerized with fluorinated diamines or siloxane-modified diamines; films formed by spin-coating or spray-coating, followed by gradient-temperature imidization |
Manufacturing Quality Control of Cyclobutane-1,2,3,4-tetracarboxylic dianhydride
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | HPLC with UV detection | Quantification based on peak area comparison against a certified reference standard using reversed-phase chromatography and UV absorbance at 220 nm. |
| Moisture Content | Karl Fischer titration | Electrochemical titration where iodine reacts stoichiometrically with water in a methanol-based reagent; endpoint detected potentiometrically. |
| Residue on Ignition | Gravimetric analysis | Sample is ignited at 750 C to ash organic matter; inorganic residue is weighed after cooling in a desiccator. |
| Chloride Impurity | Ion Chromatography (IC) | Separation of chloride anions on an ion-exchange column followed by conductivity detection and quantification against calibration standards. |
| Sulfate Impurity | Barium sulfate gravimetric method | Precipitation of sulfate as BaSO4 in acidic medium, followed by filtration, drying, and weighing of the precipitate. |
| Heavy Metals (as Pb) | ICP-OES | Digestion of sample followed by multi-element quantification via plasma emission spectroscopy calibrated for lead and other regulated metals. |
| Acid Number | Acid-base titration with NaOH | Neutralization of acidic impurities (e.g., residual carboxylic acids) using standardized sodium hydroxide solution and phenolphthalein indicator. |
| Melting Point | Capillary melting point apparatus | Thermal determination of solid-to-liquid transition range using calibrated capillary tube method per USP <741>. |
| Organic Volatile Impurities | Gas Chromatography (GC-FID) | Separation and quantification of volatile solvents or degradation products using flame ionization detection and external calibration. |
| Particle Size Distribution | Laser Diffraction | Measurement of scattered laser light intensity from dispersed particles to calculate size distribution based on Mie theory. |
| Color (APHA) | Visual comparison or spectrophotometric measurement | Comparison of sample solution color to APHA platinum-cobalt standards or measurement of absorbance at 430 nm in dilute solution. |
| Specific Optical Rotation | Polarimetry | Measurement of rotation angle of plane-polarized light passing through a solution of the compound at specified concentration and wavelength (589 nm). |
Technical Specifications of Cyclobutane-1,2,3,4-tetracarboxylic dianhydride
| Test Item | Specification |
|---|---|
| Appearance | White crystalline solid |
| Purity | >=98.0% (by NMR) |
| Melting Point | 275–280 °C |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| 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
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Download COA of Cyclobutane-1,2,3,4-tetracarboxylic dianhydride
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of Cyclobutane-1,2,3,4-tetracarboxylic dianhydride
Safety Information of Cyclobutane-1,2,3,4-tetracarboxylic dianhydride
| Pictograms |  |
| Signal Word | Warning |
| Safety Data Sheet | |
Packaging of Cyclobutane-1,2,3,4-tetracarboxylic dianhydride
Industrial Cyclobutane-1,2,3,4-tetracarboxylic dianhydride 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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