4-HYDROXYPHTHALIC ANHYDRIDE Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 27550-59-0 |
| Product name | 4-HYDROXYPHTHALIC 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-HYDROXYPHTHALIC ANHYDRIDE
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 4-HYDROXYPHTHALIC ANHYDRIDE Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 4-HYDROXYPHTHALIC ANHYDRIDE
| Industry | Application | Process |
|---|---|---|
| Polymer Materials Industry | Monomer for polyimide (PI) | Serves as a comonomer in condensation polymerization with aromatic diamines to produce polyimide resins; introduces hydroxyl functional groups to enhance adhesion or act as crosslinking sites. |
| Electronic Chemicals Industry | Resin raw material for photoresists | Used to synthesize specialty resins containing photosensitive groups (e.g., polyhydroxyimides) as film-forming resins or functional additives in photoresist formulations. |
| Fine Chemicals Industry | Intermediate for pharmaceuticals and agrochemicals | Undergoes derivatization reactions (e.g., esterification, amidation) via its hydroxyl and anhydride functional groups to synthesize compounds with specific biological activity. |
| Coatings and Adhesives Industry | Functional curing agent | Acts as a curing agent for epoxy resin systems or as a precursor for synthesizing specialty adhesive resins with high-temperature resistance and superior bond strength. |
| Chemical Synthesis Industry | Precursor for ligand synthesis | Used to synthesize aromatic-ring-containing organic ligands for the preparation of metal–organic frameworks (MOFs) or metal complexes. |
Manufacturing Quality Control of 4-HYDROXYPHTHALIC ANHYDRIDE
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | Acid-Base Titration | Quantifies active compound by titration with standardized NaOH solution using phenolphthalein indicator. |
| Moisture Content | Karl Fischer Titration | Measures water content via coulometric or volumetric reaction between water and iodine in pyridine/methanol medium. |
| Residue on Ignition | Gravimetric Analysis | Determines non-volatile inorganic impurities by high-temperature ashing followed by weighing of residual mass. |
| Heavy Metals | ICP-OES | Quantifies trace metal contaminants (e.g., Pb, Cd, Hg) by plasma excitation and elemental emission spectroscopy. |
| Chloride Impurity | Ion Chromatography | Separates and quantifies chloride ions using anion-exchange column and conductivity detection. |
| Sulfate Impurity | Barium Sulfate Gravimetry | Precipitates sulfate as BaSO4 under controlled conditions and determines mass gravimetrically. |
| Related Substances | HPLC-UV | Separates and quantifies structurally related impurities using reversed-phase chromatography and UV detection at 254 nm. |
| Melting Point | Capillary Melting Point Determination | Measures temperature range at which solid transitions to liquid using calibrated capillary apparatus. |
| Appearance | Visual Inspection | Assesses physical state, color, and presence of foreign particles against standard white background under controlled lighting. |
| Solubility in Water | Qualitative Solubility Test | Evaluates dissolution behavior in distilled water at specified temperature and agitation time. |
| pH of Aqueous Solution | Potentiometric pH Measurement | Determines hydrogen ion activity in saturated aqueous suspension using calibrated pH electrode. |
| Organic Volatile Impurities | Gas Chromatography-FID | Detects and quantifies residual solvents using capillary GC separation and flame ionization detection. |
Technical Specifications of 4-HYDROXYPHTHALIC ANHYDRIDE
| Test Item | Specification |
|---|---|
| Appearance | Light brown to brown solid |
| Purity | >=98.0% (GC) |
| Melting Point | 130–134°C |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Residue on Ignition | <=0.1% |
| Acid Value (mg KOH/g) | 450–470 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-HYDROXYPHTHALIC ANHYDRIDE
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of 4-HYDROXYPHTHALIC ANHYDRIDE
Packaging of 4-HYDROXYPHTHALIC ANHYDRIDE
Industrial 4-HYDROXYPHTHALIC 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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