Phthalic anhydride

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White crystalline needles with a mild odor. Phthalic anhydride is used in the manufacture of dyes, alkyd resins, polyester resins, insecticides and many phthalate plasticizers. It is also used to make some fluorescent dyes such as fluorescein, eosin and rhodamine.

Synonyms and Related Terms


Other Properties

Soluble in ethanol, carbon disulfide and hot water. Slightly soluble in cold water and ether.

Composition C6H4(CO)2O
CAS 85-44-9
Melting Point 130.8
Density 1.52.7
Boiling Point 285

Hazards and Safety

Combustible. Irritating to skin and mucous membranes.

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