Isophthalic acid
- M- phthalic acid
- 1,3 - benzenedicarboxylic acid
Colorless and almost odorless crystalline solid
Fixed
1.54 g · cm -3
348 ° C
610 Pa ( 250 ° C)
- PKS1 = 3.62
- PKa2 = 4.60
Sparingly soluble in water: 0.12 g · l-1 (25 ° C)
2 mg · m -3 ( inhalable aerosol fraction)
Template: Infobox chemical / molecular formula search available
Isophthalic acid ( also meta -phthalic acid ) is a chemical and belongs to the group of aromatic dicarboxylic acids ( benzene ).
Production
Isophthalic acid is produced by oxidation of meta-xylene with atmospheric oxygen.
Use
Isophthalic acid is used as the starting material of aramids, polyesters, synthetic resins for high temperature resistant electrical insulation and oil-free alkyd resins.