Synthesis of potassium phthalimide (phthalimide potassium salt)

Preparation of potassium phthalimide

Preparation of potassium phthalimide (phthalimide potassium salt; potassium, isoindol-2-ide-1,3-dione)

Preparation of potassium phthalimide (phthalimide potassium salt; potassium, isoindol-2-ide-1,3-dione)

Phthalimide is prepared by passing dry ammonia gas through melted phthalic anhydride until it is saturated and gives the correct melting point (225° C). Purification is performed by crystallizing from acetic acid. The potassium phthalimide is prepared by dissolving 10 g of the powdered phthalimide in 30 g of ethylalcohol, and adding 7 g of potassium hydroxide in 40 ml of ethyl alcohol and cooling. After washing with ethyl alcohol potassium phthalimide is dried over sulfuric acid in a desiccator or in vacuum.

A Class-Book of Organic Chemistry, by J. B. Cohen, 84, 1919





InChI Key


Canonical SMILES


MeSH Synonyms

phthalimide, phthalimide calcium (2:1) salt, phthalimide potassium salt, potassium phthalimide

Depositor-Supplied Synonyms

POTASSIUM PHTHALIMIDE, 1074-82-4, Potassium 1,3-dioxoisoindolin-2-ide, Phthalimide potassium salt, N-Potassiophthalimide, Potassium phthalimidate, N-Potassium phthalimide, Phthalimide, potassium salt, POTASSIUM PHTHALAMIDE, 1H-Isoindole-1,3(2H)-dione, potassium salt, HSDB 5781, 1,3-Dihydro-1,3-dioxoisoindole potassium salt, potassium 1,3-dioxo-1,3-dihydroisoindol-2-ide, EINECS 214-046-6, 1H-Isoindole-1,3(2H)-dione, potassium salt (1:1), NSC 167070, potassium 1,3-dioxo-2,3-dihydro-1H-isoindol-2-ide, 92014-68-1, AC1MNQ5J, UNII-X6KKA27DIL, DSSTox_CID_7358, X6KKA27DIL, AC1Q1U3B, SCHEMBL9230, DSSTox_RID_78422, Phthalimide-N potassium salt, DSSTox_GSID_27358, 85-41-6 (Parent), 160385_ALDRICH, CHEMBL3183390, 79790_FLUKA, CTK5H0784, EBD8109, FYRHIOVKTDQVFC-UHFFFAOYSA-M, MolPort-001-783-283, Phthalimide, potassium salt (8CI), Tox21_201007, ANW-53824, potassium isoindol-2-ide-1,3-dione, AKOS000121936, potassium isoindolin-2-ide-1,3-dione, AC17086, AM90358, RP24540, NCGC00258560-01, AK-98651, AN-48433, BC225493, BP-21214, I816, CAS-1074-82-4, AB1011482, KB-259347, LS-195293, ST2413692, TC-142569, FT-0083705, FT-0640165, P0403, EN300-31459, W-1266, 3B4-0405, I01-1202, 3B3-024384

Removed Synonyms

null, CID3356745

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