4-Methylphthalic anhydride Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 19438-61-0 |
| Product name | 4-Methylphthalic anhydride |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeIndustrial GradeSpecialty 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 4-Methylphthalic anhydride
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk 4-Methylphthalic anhydride Supplier from China
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
Industrial Applications of 4-Methylphthalic anhydride
| Industry | Application | Process |
|---|---|---|
| Polymers | Reactive monomer for modifying polyester and alkyd resins | Esterification and condensation polymerization with polyols (e.g., glycerol, pentaerythritol) to incorporate rigid phenyl rings, enhancing resin hardness, heat resistance, and chemical resistance |
| Coatings | Resin component for high-performance coatings | Used as an anhydride comonomer in the synthesis of alkyd or polyester resins for oven-cured or air-drying industrial coatings |
| Electronics Materials | Curing agent for epoxy resins | Reacted with epoxy resins to form crosslinked networks for electronic insulation applications such as encapsulants and laminates |
| Pharmaceutical Intermediates | Precursor for synthesizing certain active pharmaceutical ingredients | Converted via amidation, reduction, and related reactions into methylbenzoyl-containing pharmaceutical intermediates |
| Dyes & Pigments | Intermediate for synthesizing specific organic pigments or dyes | Participates in condensation or substitution reactions to construct chromophore frameworks |
Manufacturing Quality Control of 4-Methylphthalic anhydride
| Test Item | Common Testing Methods | Method Overview |
|---|---|---|
| Purity | High-Performance Liquid Chromatography (HPLC) | Using a reversed-phase C18 column, with methanol-water or acetonitrile-water as the mobile phase, and a UV detector (typically at 220–260 nm wavelength). The main component content is quantified using peak area normalization or external standard method to evaluate the purity of 4-methylphthalic anhydride. |
| Melting Point | Capillary Melting Point Determination | The sample is placed in a melting point capillary and heated at a controlled rate. The initial melting and final melting temperatures are observed and compared with the standard value (approximately 135–138 °C) to assess crystalline purity and impurity content. |
| Appearance | Visual Inspection Method | Observe the sample's color and condition (usually white to off-white crystalline powder) under natural light or standard lighting. Check for the presence of foreign matter, clumping, or discoloration. |
| Drying Loss | Thermogravimetric Analysis (TGA) or Drying to Constant Weight | The sample is dried at a specified temperature (e.g., 105 °C) until constant weight is achieved, and the percentage of mass loss is calculated to control moisture and volatile impurity content. |
| Acid Value/Anhydride Content | Acid-Base Titration | The sample is dissolved in a neutral organic solvent (such as acetone or ethanol), and titrated with a standard sodium hydroxide solution using phenolphthalein as an indicator. The acid anhydride content or acid value is calculated based on the amount of base consumed, reflecting the content of active components. |
| Heavy Metals | Atomic Absorption Spectroscopy (AAS) or Inductively Coupled Plasma Mass Spectrometry (ICP-MS) | After sample digestion, heavy metal elements such as lead, cadmium, mercury, and arsenic are determined by AAS or ICP-MS to ensure compliance with pharmacopoeia or industry limits. |
| Related Substances (Impurities) | High-Performance Liquid Chromatography (HPLC) | A gradient elution program is used to separate the main peak and potential impurity peaks (such as phthalic acid, unreacted raw materials). The impurity levels are assessed using reference standards or self-comparison methods to ensure product quality consistency. |
Technical Specifications of 4-Methylphthalic anhydride
| Test Item | Specification |
|---|---|
| Appearance | White to yellow to orange crystalline powder |
| Purity | >=98.5% (GC) |
| Melting Point | 140.0 - 144.0 °C |
| Water Content (KF) | <=0.5% |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.3% |
| Acid Value (mg KOH/g) | 620 - 650 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 4-Methylphthalic anhydride
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of 4-Methylphthalic anhydride
Packaging of 4-Methylphthalic anhydride
Industrial 4-Methylphthalic 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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