Terephthalic Acid (PTA)
CAS Number: 100-21-0
Purified terephthalic acid (PTA) is the aromatic diacid monomer for PET (polyethylene terephthalate) production — the world's most widely manufactured polyester. PTA reacts with ethylene glycol to produce PET resin used in bottles, films, and fibers. High-purity PTA with extremely low 4-CBA content is required for fiber and bottle-grade PET applications.
Technical Specifications
| appearance | White powder |
| purity (%) | ≥99.9 |
| 4-CBA (ppm) | ≤25 |
| moisture (%) | ≤0.2 |
| color (b value) | ≤1.5 |
Applications
- PET bottle-grade resin for beverage and food packaging
- PET polyester fiber and filament yarn production
- PET film for electrical insulation and packaging
- Polyester polyol for polyurethane coatings and adhesives
- Alkyd resin and powder coating polyester synthesis
Key Features
- Ultra-low 4-CBA content prevents color formation in PET fiber and bottle-grade resin
- Consistent narrow particle size distribution for uniform slurry and esterification kinetics
- Low moisture content reduces hydrolytic ring-opening of ester linkages during polymerization
- High purity enables high IV (intrinsic viscosity) PET for packaging and technical textiles
Send Inquiry
CAS Number
100-21-0
Category
Polymer Synthesis ChemicalsAvailability
In StockSample
Dispatched within 5 days