High Quality CAS: 85-44-9 Phthalic Anhydride 99.5%
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- Model NO.: Phthalic anhydride
- Appearance: Powder
- Colour: White
- Thermostable Chroma: 50
- Specification: ISO
- Type: Pharmaceutical Intermediates
- Quality: Industrial
- Molten Chroma: 20
- Trademark: Qingxin
- Origin: Shandong China
Phthalic anhydride is the organic compound with the formula C8H4O3. This anhydride of phthalic acid, a colourless solid, is an important industrial chemical, especially for the largescale production of plasticizers for plastics.
or crystalline powder
white scaly or crystalline
powder with slight colors
molten Chroma(Chroma no. )
thermostable Chroma(Chroma no. )
Chroma of vitriol(Chroma no. )
Free acid(mass fraction) %
Applications of phthalic anhydride
Phthalic anhydride is a versatile intermediate in organic chemistry, in part because it is bifunctional and cheaply available.
It undergoes hydrolysis and alcoholysis.
Hydrolysis by hot water forms orthophthalic acid.
This process is reversible: Phthalic anhydride reforms upon heating the acid above 180°C.