|
Isophthalic Acid (IPA CAS 121-91-5) for High-Performance Polymers with Thermal Stability and Chemical Resistance
| MOQ: | 500g, 1kg or 25kg for sample, 1000kg for commercial order |
| Standard Packaging: | Net Weight 25kg or 200kg/package |
| Delivery Period: | In 3 working days |
| Payment Method: | T/T,LC,OA |
| Supply Capacity: | 3000 Tons/month |
Isophthalic acid (IPA), with CAS number 121-91-5, is an aromatic dicarboxylic acid isomer commonly used in the production of high-performance polymers and resins. This white crystalline solid is a key intermediate in manufacturing unsaturated polyester resins (UPR), coatings, plasticizers, and specialty polymers. With its excellent thermal stability, chemical resistance, and mechanical properties, isophthalic acid has become essential in advanced material applications across multiple industries.
| Property | Specification |
|---|---|
| CAS Number | 121-91-5 |
| Molecular Formula | C₈H₆O₄ |
| Molecular Weight | 166.13 g/mol |
| Appearance | White crystalline powder |
| Melting Point | 345-348°C |
| Boiling Point | Decomposes before boiling |
| Density | 1.54 g/cm³ |
| Solubility | Slightly soluble in water, soluble in alcohol and acetic acid |
| Acidity (pKa) | pKa₁: 3.46, pKa₂: 4.46 |
| Flash Point | >150°C (closed cup) |
| Purity | ≥99.5% |
| Moisture Content | ≤0.5% |
| Ash Content | ≤0.01% |
- Polymer Modification: Enhances thermal and chemical resistance in polyester resins
- Cross-linking Agent: Improves mechanical properties in coating formulations
- Intermediate Synthesis: Serves as building block for plasticizers, dyes, and medicals
- UV Stabilization: Contributes to weatherability in outdoor applications
- Corrosion Resistance: Provides protective properties in industrial coatings
- Fiberglass reinforced plastics (boats, automotive parts, tanks)
- Construction materials (panels, pipes, sanitary ware)
- Gel coats and corrosion-resistant linings
- Powder coatings for appliances and furniture
- High-performance industrial coatings
- Automotive refinish and OEM coatings
- Marine and protective coatings
- Polyethylene terephthalate (PET) modification
- Polybutylene terephthalate (PBT) copolymers
- Liquid crystal polymers (LCP)
- Plasticizers for PVC and other polymers
- Dyes and pigments intermediate
- Adhesives and sealants
- Alkyd resins for paints
- Saturated polyester polyols
- Composite materials
Our isophthalic acid is produced through advanced catalytic oxidation of m-xylene using high-purity oxygen in acetic acid solvent. The process includes:
- Oxidation Reaction: m-Xylene is oxidized under controlled conditions
- Crystallization: Crude IPA is purified through multiple crystallization steps
- Centrifugation & Drying: Separation and drying to achieve desired moisture content
- Quality Control: Rigorous testing for purity, color, and particle size distribution
- Packaging: Customized packaging options (25kg bags, 500kg super sacks, bulk)
Our manufacturing facilities utilize state-of-the-art technology with closed-loop systems to minimize environmental impact and ensure consistent quality.
- ISO 9001:2015 certified manufacturing facilities
- Batch-to-batch consistency with 99.5%+ purity
- Comprehensive quality control with certificates of analysis
- Meets international standards (REACH, FDA compliant where applicable)
- Over 20 years of specialty chemicals manufacturing experience
- Dedicated R&D team for custom formulations
- Technical support for application development
- Sample availability for testing and validation
- Multiple production sites for supply security
- Strategic global warehouse network
- Flexible packaging and logistics solutions
- Just-in-time delivery capabilities
- Customized particle size and packaging options
- Competitive pricing with volume discounts
- Responsive customer service team
- Partnership approach to solving application challenges
- Environmentally responsible manufacturing processes
- Waste minimization and recycling programs
- Energy-efficient production technologies
- Compliance with global environmental regulations
A: Both are isomers of phthalic acid. Isophthalic acid has carboxyl groups at the 1 and 3 positions on the benzene ring, while terephthalic acid has them at the 1 and 4 positions. This structural difference gives IPA better solubility and different polymer properties compared to TPA.
A: Store in a cool, dry, well-ventilated area away from heat sources and incompatible materials. Keep containers tightly closed. Shelf life is typically 24 months when stored properly.
A: IPA is generally considered low hazard but may cause eye and skin irritation. Use appropriate personal protective equipment (PPE) including safety glasses, gloves, and dust mask when handling. Refer to the Safety Data Sheet (SDS) for complete handling information.
A: Yes, we offer customized milling services to achieve specific particle size distributions for optimal processing in your application.
A: All shipments include Certificate of Analysis, Safety Data Sheet, and commercial invoice. Additional documentation can be provided upon request.
A: Yes, our technical team provides comprehensive support including formulation assistance, troubleshooting, and collaborative development projects.
A: MOQ varies by packaging type. Typically 500kg for bulk orders, with sample quantities available for testing purposes.
A: We maintain multiple production facilities, strategic inventory levels, and diversified logistics partnerships to ensure consistent supply even during market disruptions.
A: Yes, our products comply with REACH, FDA (where applicable), and other international regulatory requirements. We stay updated on regulatory changes to ensure ongoing compliance.
A: Absolutely. Our R&D team specializes in developing customized grades with specific properties for unique application requirements.
