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2,3-Dioxo-2,3-dihydroindole, 2,3-Diketoindoline, 2,3-Dioxoindoline,
2,3-Indolinedione, o-Aminobenzoylformic anhydride, Isatic acid lactam,
Isatine, Isatinic acid anhydride, NSC 9262, 1H-indole-2,3-dione

Technical Data

CAS Number: 91-56-5
Molecular Formula: C8H5NO2
Molecular Weight: 147.13
Beilstein Registry Number: 383659
EC Number: 202-077-8

FabriChem Specifications

AppearanceLight Red Crystalline Powder
Assay(HPLC)98.0% Min.
Moisture0.5% Max.
Melting Point198° - 204° C
Ash0.1% Max.

Molecular Structure



Isatin is an indole (an aromatic heterocyclic organic compound) derivative. Isatin has a lactam (a cyclic amide) structure. Cyclic ester structures are active nucleuses in pharmacological activity and flavorings. They are used as intermediates for the synthesis of pharmaceuticals, herbicides, certain pigments and other chemical compounds.