tetrachlorophthalic anhydride

tetrachlorophthalic anhydride

[¦te·trə¦klȯr·ə¦thal·ik an′hī‚drīd] (organic chemistry) C6Cl4(CO)2O A white powder with a melting point of 254-255°C; slightly soluble in water; used in the manufacture of dyes and pharmaceuticals and as a flame retardant for epoxy resins.