Chemical

Products

Isophthalic Acid

Cas Number

121-91-5

Other Names

Isophthalic acid

meta-Phthalic acid

The formula

C6H4(CO2H)2

Introduction

Isophthalic acid is an organic compound with the formula C6H4(CO2H)2. This colorless solid is an isomer of phthalic acid and terephthalic acid. The main industrial uses of purified isophthalic acid are for the production of polyethylene terephthalate (PET) resin and for the production of unsaturated polyester resin (UPR) and other types of coating resins.

Physical and Chemical Properties
Physical state and Appearance : white powder
Molecular Weight : 166.14 g/mole
Melting Point : 341 - 343°C
Auto ignition temperature : 647°C
Moisture %(m/m) : 0.05
3 Carbozybenzaldhyde (mg/Kg) : 1
Ash (mg/Kg) : 6
Cobalt (mg/Kg) : < 1
Iron (mg/Kg) : < 1
Manganese (mg/Kg) : < 1
Metatoluic Acid (mg/Kg) : < 20
Purity (mg/Kg) : > 99.9
Applications

Isophthalic acid is used

1. Automotive OEM

2. High molecular weight thermoplastic polymer (PET) modifier

3. Polyester polyols for polyurethane coatings

4. Polyester-melamine baking enamels

5. Super-weatherable powder coatings

6. Unsaturated polyester resins for high-performance gel coats

7. Waterborne polyester resins with good hydrolytic stability