Isophthaloyl dichloride
Pharmaceutical Materials 2025-03-02
CAS Number: 99-63-8
Molecular Formula: C8H4Cl2O2
Molecular Weight: 203.02 g/mol
Appearance: Colorless or light yellow crystals
Melting Point: 41°C (lit.)
Boiling Point: 276°C (lit.)
Usage: Used in the synthesis of polymers, aromatic fibers, and as a precursor for various organic compounds.
| Attribute | Details |
|---|---|
| Chemical Name | Isophthaloyl dichloride |
| Synonyms | 1.3-Benzenedicarboxylic acid dichloride; 1.3-Bis(chlorocarbonyl)benzene; Isophthalic acid chloride; etc. |
| CAS Number | 99-63-8 |
| Molecular Formula | C8H4Cl2O2 |
| Molecular Weight | 203.02 g/mol |
| Appearance | Colorless or light yellow crystalline solid |
| Melting Point | 41-44°C (can vary slightly) |
| Boiling Point | 276°C |
| Density | 1.388 g/cm³ |
| Solubility | Reacts with water; soluble in ethers and other organic solvents |
| Main Uses | 1. As an intermediate in the synthesis of aromatic fibers, aromatic polyamides (aramids), and polyesters. 2. For the production of high-temperature-resistant resins, dyes, pigments, pharmaceuticals, pesticides, and other chemicals. 3. As a raw material for the manufacture of various polymers and copolymers. |
| Production Methods | Primarily produced by the phthalic anhydride route involving phthalic anhydride and phosgene, catalyzed by formamide. Alternatively, it can be produced from isophthalic acid by chloride esterification or direct chlorination. |
| Safety Information | Corrosive and irritating to skin, eyes, and respiratory tract. May cause severe burns and respiratory distress. Handle with appropriate personal protective equipment and store in a cool, dry place, away from incompatible materials and sources of ignition. |
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