7369. Phthalamide

Nomenclature

CAS number: 88-96-0
1,2-Benzenedicarboxamide; phthalic acid diamide.
C8H8N2O2; mol wt 164.16.
C 58.53%, H 4.91%, N 17.06%, O 19.49%.

Description and references

Prepd from phthalic anhydride and anhydr ammonia in benzene: Dominikiewicz, Arch. Chem. Farm. 3, 141 (1937).

Chemical structure

Properties

Minute crystals, mp 228° (commercial grades mp 221- 223°). Melts with decomposition to NH3 and phthalimide. Slightly sol in cold water, methanol. More sol in hot solvents. Heat of combustion 921.7 cal/mol. Boiling of aq or alcoholic solns produces NH3 and phthalimide. The presence of acids accelerates decompn.