4-Hydroxyphthalic acid Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 610-35-5 |
| Product name | 4-Hydroxyphthalic acid |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeMaterial GradeSpecialty GradeReagent 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 4-Hydroxyphthalic acid
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 4-Hydroxyphthalic acid Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 4-Hydroxyphthalic acid
| Industry | Application | Process |
|---|---|---|
| Chemical Synthesis | Organic synthesis intermediate | Used in the synthesis of fluorescent whitening agents, dyes, and pharmaceutical intermediates; functional groups are introduced via esterification, amidation, and related reactions |
| Analytical Chemistry | Fluorescent probe precursor | Employed as a raw material for preparing fluorescent probes for metal ions (e.g., Al³⁺, Zn²⁺); chelating structures are formed through condensation with specific ligands |
| Materials Science | Polymer monomer | Participates in the synthesis of polyester or polyimide polymers, imparting rigidity and thermal stability |
| Pharmaceutical R&D | Drug synthesis building block | Used to construct biologically active heterocyclic scaffolds, such as quinoline or isoquinoline derivatives |
Manufacturing Quality Control of 4-Hydroxyphthalic acid
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | Acid-Base Titration | Quantifies 4-hydroxyphthalic acid by titration with standardized NaOH solution using phenolphthalein indicator. |
| Moisture Content | Karl Fischer Titration | Determines water content via coulometric or volumetric reaction between water and iodine in a methanol-based reagent. |
| Heavy Metals (as Pb) | Atomic Absorption Spectroscopy (AAS) | Measures total heavy metals after acid digestion by quantifying absorbance of ground-state atoms at characteristic wavelengths. |
| Sulfated Ash | Gravimetric Analysis | Determines inorganic residue after combustion with sulfuric acid treatment and high-temperature incineration. |
| Chloride Impurity | Ion Chromatography (IC) | Separates and quantifies chloride ions using anion-exchange column and conductivity detection. |
| Related Substances | High-Performance Liquid Chromatography (HPLC) | Separates and quantifies impurities and degradation products using reversed-phase C18 column and UV detection. |
| Melting Point | Capillary Melting Point Determination | Measures temperature range at which solid transitions to liquid using calibrated capillary apparatus. |
| Residue on Ignition | Gravimetric Analysis | Determines non-volatile inorganic residue after high-temperature ignition in a muffle furnace. |
| pH of Aqueous Solution | Potentiometric pH Measurement | Measures hydrogen ion activity in a saturated aqueous suspension using calibrated pH electrode. |
| Organic Volatile Impurities | Gas Chromatography (GC) | Detects and quantifies residual solvents using headspace GC with FID detection. |
| Iron (Fe) Content | Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) | Quantifies iron after acid digestion by measuring element-specific atomic emission intensities. |
| Color (APHA) | Visual Comparison or Spectrophotometry | Evaluates yellowness intensity by comparing sample solution to APHA color standards or measuring absorbance at 430 nm. |
Technical Specifications of 4-Hydroxyphthalic acid
| Test Item | Specification |
|---|---|
| Appearance | Yellow solid |
| Purity | >=98.0% (HPLC) |
| Melting Point | 205-210°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 4-Hydroxyphthalic acid
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of 4-Hydroxyphthalic acid
Packaging of 4-Hydroxyphthalic acid
Industrial 4-Hydroxyphthalic 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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