Product Description of Terephthalic Acid CAS#100-21-0
Purified terephthalic acid (PTA) is a key organic chemical raw material widely used in large-scale industrial production. It is available as a white crystalline powder or needle-shaped crystals, soluble in alkaline solutions and slightly soluble in hot ethanol, while remaining insoluble in water, ether, glacial acetic acid, and chloroform.
PTA is extensively used in industries such as chemical fibers, light industry, electronics, and construction. Its primary applications include the production of polyester fiber, polyester chips, bottle-grade chips, and film-grade chips.
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Chemical Properties of Terephthalic Acid CAS#100-21-0
| 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. |
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Product Application of Terephthalic Acid CAS#100-21-0
Terephthalic acid is a key raw material for the production of polyester resins, fibers, films, engineering plastics, insulating varnishes, and plasticizers. It is also widely used in the manufacture of pharmaceuticals, dyes, and various other chemical products.
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