Isophthaloyl Chloride
- CAS No.99-63-8
- GradeIndustrial / Pharmaceutical
- Availability● In Stock
High-purity Isophthaloyl Chloride (99.96%) for industrial-scale synthesis of aramid fibers, high-performance polymers, and specialty chemicals.
Request Bulk PricingProduct Technical Details
Product Overview
Isophthaloyl Chloride (CAS 99-63-8) is a critical aromatic diacid chloride widely employed as a high-reactivity building block in advanced polymer chemistry. This compound serves as an essential intermediate in the production of meta-aramid fibers, such as Nomex® analogs, high-temperature-resistant polyamides, and specialty engineering plastics. Its symmetrical 1,3-benzenedicarbonyl structure enables precise control over polymer chain architecture, resulting in materials with exceptional thermal stability, chemical resistance, and mechanical strength.
Specifications
| Molecular Formula | C₈H₄Cl₂O₂ |
|---|---|
| Molecular Weight | 203.02 g/mol |
| Appearance | White crystalline solid |
| Purity (GC) | ≥99.5% (Typical: 99.96%) |
| Water Content | ≤0.05% (Typical: 0.011%) |
| Melting Point | 43–44 °C |
| Boiling Point | 276 °C (lit.) |
| Density | 1.388 g/cm³ |
| Refractive Index | 1.570 at 47 °C |
| Solubility | Reacts with water; soluble in common organic solvents such as dichloromethane, THF, and acetonitrile |
Industrial Applications
As a versatile bifunctional acylating agent, Isophthaloyl Chloride is indispensable in multiple high-value chemical manufacturing sectors:
- Aramid Fiber Production: Key monomer for synthesizing meta-oriented aromatic polyamides used in flame-resistant textiles, protective gear, and electrical insulation.
- High-Performance Polymers: Enables the fabrication of polyesters, polyketones, and polyimides with superior thermal and mechanical properties for aerospace and automotive applications.
- Pharmaceutical & Agrochemical Intermediates: Serves as a scaffold in the construction of complex heterocyclic systems for active ingredient development.
- Dyes and Pigments: Utilized in the synthesis of thermally stable colorants for engineering plastics and high-end coatings.
Handling and Storage
Isophthaloyl Chloride is moisture-sensitive and reacts vigorously with water, releasing hydrochloric acid. Store in a cool, dry, and well-ventilated area under inert atmosphere (e.g., nitrogen). Keep containers tightly sealed and segregated from alkalis, oxidizing agents, and sources of moisture. Use appropriate PPE including chemical-resistant gloves, goggles, and respiratory protection during handling.
