Phthalic anhydride is the cyclic dicarboxylic anhydride that is the anhydride of phthalic acid. It appears as a colorless to white lustrous solid in the form of needles with a mild distinctive odor. Used in the manufacture of materials such as artificial resins.
Synonym/Trade Name: Isobenzofuran-1,3-dione; 1,3-Isobenzofurandione; 2-Benzofuran-1,3-dione
CAS No：85-44-9
CHEMICAL FORMULA：C8H4O3
Typical Physical Properties
(These properties are typical but do not constitute specifications.)
Properties
Specifications
Molecular weight (g/mol)
148.12
Boiling point
284.5 °C
Flash point (Tag Closed Cup)
152 °C
Specific gravity
0.8018
Density
Not applicable
Solubility
6 g/l
Evaporation rate (n-butyl acetate = 1.0)
Not applicable
Resin
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