China Factory Direct
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| CAS number | 19438-64-3 |
| Product name | Methyl tetrahydrophthalic anhydride |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Material GradeSpecialty GradeIndustrial GradeElectronic Grade |
| Packaging | 25L/drum200L/drum1000L/IBC |
| 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 |
|---|---|---|
| Plastics | Curing agent for phenolic resins | Heated to cure after mixing with phenolic resin |
| Coatings | Curing agent for epoxy resins | Heated to cure after mixing with epoxy resin |
| Adhesives | Crosslinking agent for adhesives | Heated to cure after mixing with the resin system |
| Engineering Plastics | Modified polyester resins | Used in polyester resin modification |
| Electronic Materials | Encapsulation materials | Used as an epoxy resin curing agent |
| Composites | Curing agent for fiber-reinforced composites | Used in the curing process of unsaturated polyester resins |
| Detection Item | Common Analytical Method | Method Overview |
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| Appearance | Visual Inspection | Assessment of physical state and color by direct observation under controlled lighting. |
| Acid Value | Acid-Base Titration | Neutralization of acidic groups with standardized KOH solution using phenolphthalein indicator. |
| Purity (Main Component) | Gas Chromatography (GC) | Separation and quantification of methyltetrahydrophthalic anhydride based on retention time and peak area. |
| Moisture Content | Karl Fischer Titration | Electrochemical titration using iodine generated in situ to react stoichiometrically with water. |
| Color (APHA) | Visual Comparison or Spectrophotometry | Comparison of sample color intensity against APHA platinum-cobalt standards or measurement at 430 nm. |
| Density | Digital Density Meter | Measurement of mass per unit volume using oscillating U-tube principle at specified temperature. |
| Refractive Index | Refractometry | Determination of light bending angle at air-sample interface using calibrated refractometer. |
| Residue on Ignition | Gravimetric Analysis | Weighing of non-volatile residue after high-temperature ashing in a muffle furnace. |
| Chloride Content | Ion Chromatography (IC) | Separation and quantification of chloride ions using anion-exchange column and conductivity detection. |
| Heavy Metals (as Pb) | Atomic Absorption Spectroscopy (AAS) | Quantification of total heavy metals after acid digestion by measuring absorbance at characteristic wavelength. |
| Free Acid Content | Acid-Base Titration | Titration of residual carboxylic acid impurities with standardized NaOH solution. |
| Anhydride Content | Hydroxylamine Hydrochloride Titration | Reaction of anhydride groups with hydroxylamine followed by back-titration of unreacted hydroxylamine. |
| Test Item | Specification |
|---|---|
| Appearance | Colorless to pale yellow liquid |
| Purity | >=98.0% |
| Water Content (KF) | <=0.5% |
| Acid Value (mg KOH/g) | 620-660 |
| Refractive Index (n20/D) | 1.485-1.495 |
| Relative Density (20°C/25°C) | 1.155-1.175 g/cm³ |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Odor | Characteristic mild anhydride odor |
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| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
| Pictograms | ![]() |
| Signal Word | Warning |
| 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.