China Factory Direct
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| CAS number | 3425-89-6 |
| Product name | 1,2,3,6-Tetrahydro-4-methylphthalic anhydride |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Pharmaceutical GradeMaterial GradeSpecialty GradeIndustrial 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) |
Based on current marketvolatility and material availability.
17+ years in chemical exports.Fully compliant, reliable supply.Your B2B partner in bulk chemical procurement.
| Industry | Application | Process |
|---|---|---|
| Electronics | Epoxy curing agent (for semiconductor packaging and printed circuit boards) | Thermal curing |
| Composites | Curing agent for reinforced plastics (e.g., wind turbine blades, automotive lightweight components) | High-temperature, high-pressure molding |
| Coatings | Crosslinker for weather-resistant coatings (industrial corrosion protection, marine coatings) | Solvent evaporation/thermal curing |
| Adhesives | Curing component for high-strength epoxy adhesives (structural adhesives for construction and aerospace) | Ambient-temperature or elevated-temperature curing |
| Pharmaceutical Intermediates | Synthesis of active pharmaceutical ingredients (e.g., antibiotics, antineoplastic agents) | Catalytic reaction/purification |
| Detection Item | Common Analytical Method | Method Overview |
|---|---|---|
| Assay (Purity) | Acid-Base Titration | Quantifies acid anhydride content by hydrolysis with standardized NaOH and back-titration with HCl. |
| Color | APHA Color Scale | Compares sample color to platinum-cobalt standard solutions using visual or spectrophotometric matching. |
| Water Content | Karl Fischer Titration | Measures water via coulometric or volumetric reaction between water and iodine in pyridine/methanol medium. |
| Acid Number | Acid-Base Titration | Determines free carboxylic acid content by titration with KOH in ethanol/isopropanol. |
| Residue on Ignition | Gravimetric Analysis | Measures non-volatile inorganic impurities after high-temperature ashing and weighing. |
| Heavy Metals | ICP-OES | Quantifies metal impurities (e.g., Pb, Fe, Cu) by plasma excitation and elemental emission spectroscopy. |
| Chloride Content | Potentiometric Titration | Detects chloride ions using silver nitrate titrant and silver/silver chloride indicator electrode. |
| Refractive Index | Refractometry | Measures light bending angle in liquid sample at specified temperature to assess purity and composition. |
| Specific Gravity | Pycnometry | Determines density relative to water using calibrated glass pycnometer at controlled temperature. |
| Gas Chromatographic Purity | GC-FID | Separates and quantifies organic components using capillary column and flame ionization detection. |
| Melting Point | Capillary Melting Point Apparatus | Determines solid-to-liquid transition temperature range using calibrated heating block and capillary tube. |
| Appearance | Visual Inspection | Assesses physical state, clarity, and presence of suspended particles or phase separation under controlled lighting. |
| Test Item | Specification |
|---|---|
| Appearance | White crystalline solid |
| Purity | >=98.5% |
| Water Content (KF) | <=0.5% |
| Melting Point | 72-76°C |
| Acid Value (mg KOH/g) | 450-470 mg KOH/g |
| Total Impurities | <=1.5% |
| Single Impurity | <=0.5% |
| Color (APHA/Pt-Co) | <=50 |
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| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
| Pictograms | ![]() ![]() |
| Signal Word | Danger |
| Safety Data Sheet | |
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.