cis-1,2,3,6-Tetrahydrophthalic anhydride Bulk Supply for Industrial Use
China Factory Direct
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| CAS number | 935-79-5 |
| Product name | cis-1,2,3,6-Tetrahydrophthalic anhydride |
| Stock | Stock readily available; annual supply capacity exceeding 1,000 tons. |
| Grade | Industrial 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 cis-1,2,3,6-Tetrahydrophthalic anhydride
Post-sale: Full documentation is provided.
To request documents, please contact us via email at sales@GRchemical.com.
Bulk cis-1,2,3,6-Tetrahydrophthalic anhydride Supplier from China
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Industrial Applications of cis-1,2,3,6-Tetrahydrophthalic anhydride
| Industry | Application | Process |
|---|---|---|
| Electronics & Electrical | Epoxy resin curing agent | Used as an anhydride-type curing agent in the curing of encapsulants, potting compounds, and insulating materials for electronic components, imparting excellent thermal resistance, electrical insulation, and mechanical strength. |
| Electronics & Electrical | Raw material for electronic-grade epoxy molding compound (EMC) | Reacted with polyols or phenolic resins to produce epoxy molding compounds for semiconductor packaging, enhancing moisture resistance and thermal stability of the packaging material. |
| Composites | Unsaturated polyester resin modifier | Used to produce modified unsaturated polyester resins, improving weather resistance, thermal stability, and mechanical properties—commonly applied in fiberglass-reinforced plastic (FRP) manufacturing. |
| Coatings Industry | Raw material for alkyd resins | Serves as a dibasic acid feedstock in alkyd resin synthesis for coatings, enhancing film hardness, gloss, and drying speed. |
| Coatings Industry | Curing agent for powder coatings | Used in combination with hydroxyl-functional polyester resins as a crosslinking curing agent for powder coatings, delivering good flow leveling and resistance to yellowing. |
| Pharmaceutical Chemicals | Pharmaceutical intermediate | Employed in the synthesis of specific drug molecules or pharmaceutical intermediates, leveraging its tetrahydrophthalic ring structure for subsequent chemical modification. |
| Fine Chemicals | Plasticizer production | Esterified to produce tetrahydrophthalic anhydride-based plasticizers, improving flexibility and processability of polymeric materials. |
| Adhesives | Curing agent for epoxy adhesives | Formulated into heat-resistant epoxy adhesives for structural bonding of metals or ceramics under high-temperature conditions. |
Manufacturing Quality Control of cis-1,2,3,6-Tetrahydrophthalic anhydride
| Test Item | Common Testing Methods | Method Overview |
|---|---|---|
| Appearance | Visual Inspection | Place the sample in a transparent container against a white background and observe under natural light or standard illumination to determine whether it is a white crystalline or powdered substance and whether any impurities are present. |
| Melting Point | Capillary Melting Point Determination | Heat the sample using a melting point apparatus or capillary method and record the temperature range from the onset to complete melting to assess purity. The typical melting point of THPA is approximately 100–103°C. |
| Content (Purity) | Acid Value Titration / High-Performance Liquid Chromatography (HPLC) | Acid Value Method: Titrate the sample with standardized NaOH solution; calculate the acid value based on the volume of alkali consumed, then convert it to THPA content. HPLC Method: Use a reversed-phase chromatography column with a UV detector (e.g., at 210 nm) and external standard quantification for high accuracy, suitable for complex matrices. |
| Water Content | Karl Fischer Titration | Utilize the quantitative reaction between iodine, sulfur dioxide, and water in methanol; determine water content by measuring either electrical charge consumption or reagent usage, suitable for trace water analysis. |
| Color | Platinum-Cobalt Color Scale | Dissolve the sample in an appropriate solvent (e.g., water or ethanol) and compare its color against a standard platinum-cobalt color chart to assess color intensity, reflecting impurities or oxidation levels. |
| Volatile Matter | Thermogravimetric Analysis (TGA) or Oven Drying Loss Method | Dry a specified amount of sample at a defined temperature (e.g., 105°C), then calculate the volatile content based on the mass difference before and after drying. |
| Acid Value | Acid-Base Titration | Accurately weigh the sample, dissolve it in neutral ethanol, and titrate with standardized NaOH solution to the endpoint (pink color with phenolphthalein indicator); calculate the amount of KOH consumed per gram of sample (mg KOH/g). |
| Related Substances (Impurities) | High-Performance Liquid Chromatography (HPLC) | Separate the main peak from impurity peaks using a UV detector to identify and quantify by-products such as phthalic acid and unreacted starting materials, evaluating purity and impurity limits. |
| Particle Size Distribution | Laser Diffraction Particle Size Analysis | Disperse the sample in a liquid or gas medium and determine particle size distribution using laser scattering principles, suitable for quality control of powdered THPA. |
| pH Value (Solution) | pH Meter Method | Prepare a defined concentration of THPA aqueous solution (e.g., 1% w/v) and measure its acidity using a calibrated pH meter. |
Technical Specifications of cis-1,2,3,6-Tetrahydrophthalic anhydride
| Test Item | Specification |
|---|---|
| Appearance | White crystalline solid |
| Purity | >=98.0% (by GC) |
| Melting Point | 130.0–134.0°C |
| Water Content (KF) | <=0.5% |
| Acid Value (mg KOH/g) | 620–650 |
| Total Impurities | <=2.0% |
| Single Impurity | <=0.5% |
| Color (APHA/Pt-Co) | <=50 |
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 cis-1,2,3,6-Tetrahydrophthalic anhydride
| CAS/Product ID | *Required fields | |
| Lot/Batch Number | *Required fields | |
NMR Spectra of cis-1,2,3,6-Tetrahydrophthalic anhydride
Safety Information of cis-1,2,3,6-Tetrahydrophthalic anhydride
| Pictograms |   |
| Signal Word | Danger |
| Safety Data Sheet | |
Packaging of cis-1,2,3,6-Tetrahydrophthalic anhydride
Industrial cis-1,2,3,6-Tetrahydrophthalic 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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