HOMOPHTHALIC ANHYDRIDE Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 703-59-3 |
| Product name | HOMOPHTHALIC ANHYDRIDE |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Industrial GradeMaterial GradeElectronic GradeSpecialty GradeFood 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 HOMOPHTHALIC ANHYDRIDE
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk HOMOPHTHALIC ANHYDRIDE Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of HOMOPHTHALIC ANHYDRIDE
| Industry | Application | Process |
|---|---|---|
| Coatings | Manufacturing polyester resins | Used in condensation polymerization |
| Adhesives | Manufacturing epoxy resins | Applied in crosslinking reactions |
| Plastics | Producing unsaturated polyester resins | Employed in free-radical polymerization |
| Textiles | Manufacturing polyester fibers (e.g., polyester) | Applied in esterification reactions |
| Electronics | Producing epoxy resin encapsulants | Used in condensation polymerization |
| Automotive | Manufacturing polyester resins for coatings | Used in condensation polymerization |
| Packaging | Producing polyester films (e.g., PET) | Applied in esterification and condensation polymerization |
| Construction | Manufacturing fiberglass-reinforced plastics (FRP) | Applied in unsaturated polyester synthesis |
| Food | Production of food packaging materials | Applied in esterification to produce food-grade materials |
Manufacturing Quality Control of HOMOPHTHALIC ANHYDRIDE
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | Acid-Base Titration with NaOH | Quantifies phthalic anhydride by hydrolysis to phthalic acid followed by titration with standardized sodium hydroxide solution. |
| Color (APHA) | Visual Comparison or Spectrophotometric Measurement | Compares sample color against APHA platinum-cobalt standards using visual assessment or absorbance at 430 nm. |
| Melting Point | Capillary Melting Point Determination | Measures temperature range at which solid transitions to liquid using calibrated capillary apparatus. |
| Moisture Content | Karl Fischer Titration | Determines water content via coulometric or volumetric reaction between iodine and water in methanol-based reagent. |
| Ash Content | Gravimetric Analysis (Ignition at 550 C) | Measures non-volatile residue after high-temperature ignition and subsequent weighing. |
| Chloride Content | Ion Chromatography (IC) | Separates and quantifies chloride ions using ion-exchange column and conductivity detection. |
| Heavy Metals (as Pb) | Atomic Absorption Spectroscopy (AAS) | Quantifies total heavy metals after acid digestion by measuring absorption of specific wavelength light by ground-state atoms. |
| Residue on Ignition | Gravimetric Analysis (Ignition at 550 C) | Same principle as ash content; measures insoluble inorganic residue after controlled ignition. |
| Sulfated Ash | Gravimetric Analysis (H2SO4 treatment + ignition) | Measures ash content after sulfuric acid pretreatment to convert organometallics to sulfates prior to ignition. |
| Organic Impurities (Phthalic Acid, Maleic Anhydride) | Gas Chromatography (GC) with FID | Separates and quantifies volatile organic impurities using capillary column and flame ionization detection. |
| Particle Size Distribution | Laser Diffraction | Measures size distribution of solid particles in suspension by analyzing angular variation of scattered laser light. |
| Bulk Density | Gravimetric Volumetric Method | Determines mass per unit volume of freely packed material using standardized cylinder and tapping procedure. |
Technical Specifications of HOMOPHTHALIC ANHYDRIDE
| Test Item | Specification |
|---|---|
| Appearance | Pale-yellow solid |
| Purity | >=98.0% (GC-MS) |
| Melting Point | 130.0–132.0°C |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Acid Value (mg KOH/g) | 640–660 mg KOH/g |
| 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 HOMOPHTHALIC ANHYDRIDE
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of HOMOPHTHALIC ANHYDRIDE
Packaging of HOMOPHTHALIC ANHYDRIDE
Industrial HOMOPHTHALIC 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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