Terephthalic acid CAS#100-21-0
Essential Industrial Raw Material – Serves as a key feedstock for multiple large-scale organic chemical products.
High Purity and Stable Form – White needle-shaped crystals or powder suitable for diverse processing needs.
Wide Industrial Applications – Extensively used in chemical fibers, light industry, electronics, and construction.
Key Polyester Component – Critical for producing polyester fiber chips, bottle chips, and film chips.
Terephthalic acid (PTA) is an important organic chemical raw material and one of the major bulk organic raw materials. It appears as white needle-shaped crystals or powder. It is soluble in alkaline solutions, slightly soluble in hot ethanol, and insoluble in water, ether, glacial acetic acid, and chloroform. It is widely used in various sectors of the national economy, including chemical fibers, light industry, electronics, and construction. PTA's applications are relatively concentrated, including polyester fiber chips, polyester fiber, bottle chips, and film chips.
English name | Terephthalic acid |
English synonyms | Terephthalic acid 98%;Terephthalic a;Acide terephtalique;acideterephtalique;acideterephtalique(french);Benzene-p-dicarboxylic acid;Kyselina tereftalova;Kyselina terftalova |
CAS number | 100-21-0 |
Molecular formula | C8H6O4 |
Molecular weight | 166.13 |
EINECS number | 202-830-0 |
Mol file | 100-21-0.mol |
Melting point | >300 °C (lit.) |
Boiling point | 214.32°C (rough estimate) |
Density | 1.58 g/cm3 at 25 °C |
Vapor pressure | <0.01 mm Hg ( 20 °C) |
Refractive index | 1.5100 (estimate) |
Flash point | 260°C |
Storage conditions | Sealed in dry,Room Temperature |
Solubility | Solubility in water: 15 mg/L |
Formula | Crystalline powder |
Acidity coefficient (pKa) | 3.51(at 25℃) |
Color | White |
pH | 3.36(1 mM solution);2.79(10 mM solution);2.26(100 mM solution) |
Water solubility | slightly soluble in water (0,017 g/L at 25°C) |
Stability | Stable. Flammable. Incompatible with strong oxidizing agents. |
Terephthalic acid is an important raw material for the manufacture of polyester resins, films, fibers, insulating varnishes and engineering plastics. It is an important raw material for polyester fibers, films, plastic products, insulating varnishes and plasticizers. It is also used in the production of medicines, dyes and other products.
