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Technical Data Sheet
Eastman™ Purified Terephthalic Acid (EPTA)

  • Adhesives/sealants-B&C
  • Architectural coatings
  • Auto OEM
  • Automotive
  • Coil coatings
  • General industrial coatings
  • Graphic arts
  • Intermediates
  • Paints & coatings
  • Protective coatings
  • Water packaging
  • Wind energy
Key Attributes
  • Excellent weathering
  • Good chemical and stain resistance
  • Good hardness/flexibility balance
  • Ideal glass transition temperature range
  • Outstanding powder flow and fluidization characteristics

Product Description

IUPAC: 1,4-benzenedecarboxylic acid

Eastman™ Purified Terephthalic Acid (PTA) is used to manufacture polyester coatings resins for use in the formulation of general metal, appliance, automotive, industrial maintenance, and coil coatings. The primary application for PTA is in combination with Eastman NPG™ Glycol in polyester powder coating resins. It has also been used in unsaturated polyesters for fiberglass-reinforced plastics applications.

The aromatic ring of PTA imparts excellent hardness and corrosion and stain resistance to coatings resins and unsaturated polyesters. PTA has moderate solubility in molten glycols which can increase synthesis times, and it imparts moderate solubility to resins.

Eastman™ PTA is only available in the United States in bulk quantities.

Typical Properties

PropertyTest MethodTypical Value, Units
Molecular Weight 166.14
Empirical Formula C8H6O4
Appearance White Powder
Odor Odorless
4-Carboxybenzaldehyde (4-CBA) 200 ppm max.
Volatiles 0.12 wt % max.
Cobalt 10 ppm max.
Melting Pointa >300 °C (>572 °F)
Acid Number (mg KOH/g) 675
     CIE b* 5.3 max.
     in Water Negligible
Specific Gravity 
     @ 15°C 1.51
Flash Point 
     Cleveland Open Cup 271 °C (519.8 °F)
Autoignition TemperatureASTM D 2155496 °C (924.8 °F)
Chemical Inventory Listings TSCA (USA), EINECS (JAPAN)


Eastman and its marketing affiliates shall not be responsible for the use of this information, or of any product, method, or apparatus mentioned, and you must make your own determination of its suitability and completeness for your own use, for the protection of the environment, and for the health and safety of your employees and purchasers of your products. No warranty is made of the merchantability of fitness of any product, and nothing herein waives any of the Seller's conditions of sale.

4/4/2018 9:11:18 PM