Home > News > Industry News

Exploring the Physical Properties and Specifications of PTA


PTA, or Purified Terephthalic Acid, is a key ingredient in the chemical industry, primarily used in the production of polyester resins and fibers. Its physical properties and specifications are crucial in determining its suitability for various applications. In this blog, we'll delve into the key physical properties and specifications of PTA.

1. Appearance

PTA typically appears as a white, crystalline solid. It is odorless and non-toxic, making it safe to handle under normal conditions.

2. Molecular Weight and Formula

PTA has a molecular weight of 166.13 g/mol and a molecular formula of C8H6O4. This simple yet robust structure contributes to its unique physical and chemical properties.

3. Melting Point

PTA has a high melting point, typically ranging from 425°C to 427°C. This high melting point ensures its stability and suitability for high-temperature processes in polyester production.

4. Solubility

PTA is insoluble in water but soluble in organic solvents such as ethanol, acetone, and ether. This solubility property allows for its easy handling and processing in organic solvent systems.

5. Density

PTA has a relatively high density, ranging from 1.53 to 1.55 g/cm³. This high density contributes to its bulkiness and compact nature, which is favorable for efficient storage and transportation.

6. Particle Size

PTA particles are typically produced in a range of sizes, depending on the specific application. Smaller particle sizes are preferred for faster dissolution and reaction rates, while larger particles may be suitable for specific processing requirements.

7. Purity

PTA purity is a crucial specification, as it directly affects the quality of the polyester products. High-purity PTA is essential for producing polyester with superior properties such as strength, durability, and colorfastness.


PTA's physical properties and specifications play a vital role in determining its suitability for various applications. Its high melting point, insolubility in water, high density, and adjustable particle size make it an ideal choice for polyester production. Additionally, the purity of PTA is crucial for ensuring the quality of the final polyester product. Understanding these properties and specifications helps us appreciate the importance of PTA in the chemical industry and its widespread use in various applications.

Previous:No News
Next:No News

Leave Your Message