What is "phthalimide"

Phthalimide \Phthal"i*mide\, n. [Phthalic + imide.] (Chem.) An imido derivative of phthalic acid, obtained as a white crystalline substance, C6H4.(CO)2NH, which has itself (like succinimide) acid properties, and forms a series of salts. Cf. Imido acid, under Imido.

n. (context organic compound English) The imide of phthalic acid; it is used in the manufacture of some plastics

Phthalimide is the organic compound with the formula CH(CO)NH. It is the imide derivative of phthalic anhydride. It is a sublimable white solid that is slightly soluble in water but more so upon addition of base. It is used as a precursor to other organic compounds as a masked source of ammonia.