4-Hydroxyisophthalic acid Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 636-46-4 |
| Product name | 4-Hydroxyisophthalic acid |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Agricultural GradeMaterial GradeSpecialty GradeIndustrial 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-Hydroxyisophthalic acid
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 4-Hydroxyisophthalic acid Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 4-Hydroxyisophthalic acid
| Industry | Application | Process |
|---|---|---|
| Pharmaceuticals | Synthesis of pharmaceutical intermediates, including antihypertensive agents and antimicrobials | Used as a precursor to introduce functional groups via esterification, amidation, and related reactions |
| High-performance polymers | Production of high-performance polyesters and liquid crystal polymers to enhance thermal resistance and mechanical strength | Condensed with diols or incorporated as a monomer in copolymerization reactions |
| Dyes and pigments | Synthesis of azo dyes and fluorescent whitening agents to improve color fastness and stability | Applied in diazotization-coupling reactions or as a chromophore-modifying component |
| Agricultural chemicals | Preparation of herbicides and plant growth regulators | Used to synthesize active compounds through functional group transformations |
| Analytical chemistry | Chelating agent for metal ions, employed in detection or separation of specific metals | Forms stable complexes with metal ions for chromatographic or spectroscopic analysis |
Manufacturing Quality Control of 4-Hydroxyisophthalic acid
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | Acid-Base Titration with Standardized NaOH | Quantifies carboxylic acid groups by neutralization with standardized sodium hydroxide using phenolphthalein or potentiometric endpoint detection. |
| Loss on Drying (LOD) | Gravimetric Analysis (105 °C, 2 h) | Measures volatile content (e.g., residual solvents, moisture) by weight loss after controlled heating under standard conditions. |
| Residue on Ignition (Sulfated Ash) | Gravimetric Analysis (500–600 °C) | Determines inorganic impurities by incinerating sample with sulfuric acid and weighing residual ash. |
| Heavy Metals (Pb, Cd, Hg, As) | ICP-MS or ICP-OES after Acid Digestion | Quantifies trace metallic impurities via elemental detection after microwave-assisted nitric/hydrochloric acid digestion. |
| Chloride Impurity | Ion Chromatography (IC) or Potentiometric Titration with AgNO₃ | Separates and quantifies chloride ions using anion-exchange chromatography or silver nitrate titration with selective electrode detection. |
| Related Substances (Impurity Profile) | HPLC with UV Detection (254 nm) | Separates and quantifies structurally related impurities (e.g., mono-acid, ester, decarboxylated analogs) using reversed-phase C18 column and UV absorbance. |
| Melting Point | Capillary Melting Point Apparatus | Determines purity-dependent thermal transition temperature range using calibrated capillary apparatus per USP/EP guidelines. |
| Water Content | Karl Fischer Coulometric Titration | Quantifies trace water based on stoichiometric electrochemical iodine generation reacting with water in anhydrous methanol medium. |
Technical Specifications of 4-Hydroxyisophthalic acid
| Test Item | Specification |
|---|---|
| Appearance | Pale-yellow solid |
| Purity | >=98.0% (HPLC) |
| Melting Point | 320-325 °C (decomposes) |
| 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-Hydroxyisophthalic acid
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of 4-Hydroxyisophthalic acid
Packaging of 4-Hydroxyisophthalic acid
Industrial 4-Hydroxyisophthalic 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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