Isophthalic acid is also called isophthalic acid and 1,3-phthalic acid. It is a white crystalline powder or needle crystal. It is easily soluble in alcohol and glacial acetic acid, slightly soluble in boiling water but insoluble in cold water, almost insoluble in benzene and petroleum ether.
Substance: 1,3-Benzenedicarboxylic Acid; IPA
Chemical Formula: C8H6O4
Molecular Mass: 166.13 g/mol
CAS NO.: 121-91-5
Origin: China
Application: Used in the production of alkyd resins, unsaturated polyester resins and other high polymers and plasticizers. It is also used in the production of film film couplers, coatings and polyester fiber dyeing modifiers and medicines.
Specification:
| Item: | Product index | Measured value |
| Premium | ||
| appearance | White powder | White powder |
| 3-CBA（mg/kg） | ≤25 | 3.0 |
| MT acid(mg/kg) | ≤150 | 45 |
| Acid value（mg KOH/g） | 675±2 | 673.6 |
| Water content (%) | ≤0.1 | 0.10 |
| Hue (APHA) | ≤10 | 2.5 |
| Ash (mg/kg) | ≤15 | 4.1 |
| Heavy metals (mg/kg) | ≤10 | 1.59 |
| Fe (mg/kg) | ≤2.0 | 0.22 |
| Test result | Passed | |
