Phthalic Anhydride
Phthalic anhydride is the organic compound with the formula C6H4(CO)2O. It is the anhydride of phthalic acid. Phthalic anhydride is a principal commercial form of phthalic acid. It was the first anhydride of a dicarboxylic acid to be used commercially. This white solid is an important industrial chemical, especially for the large-scale production of plasticizers for plastics. In 2000, the worldwide production volume was estimated to be about 3 million tonnes per year.
Application
Phthalic Anhydride is a colourless solid is an important industrial chemical, especially for the large-scale production of plasticizers for plastics. Phthalic Anhydride is widely used in boating, automobile and construction industries.
| Chemical formula | C8H4O3 |
|---|---|
| Molar mass | 148.1 g/mol |
| Appearance | white flakes |
| Odor | characteristic, acrid |
| Density | 1.53 g/cm3, solid; 1.20 g/mL, molten |
| Melting point | 131.6 °C (268.9 °F; 404.8 K) |
| Boiling point | 295 °C (563 °F; 568 K) sublimates |
| Solubility in water | 0.62 g/100g (20—25 °C); |
| Vapor pressure | 0.0015 mmHg (20 °C) |
| Magnetic susceptibility (χ) | −67.31×10−6 cm3/mol |
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