4-Chlorophthalimide (CAS NO.7147-90-2) is also named as 1H-isoindole-1,3(2H)-dione, 5-chloro- ; 5-Chloro-1H-isoindole-1,3(2H)-dione . 4-Chlorophthalimide (CAS NO.7147-90-2) is slight yellow crystalline powder.