The chemical Ninhydrin has a designated molecular formula of C9H6O4 and a molecular weight of 178.143 g/mol. Synonyms may include: 4-07-00-02786 (Beilstein Handbook Reference), AI3-04464, BRN 1910963, CCRIS 4849, 2,2-Dihydroxy-1,3-indandione, 2,2-Dihydroxy-1H-indene-1,3(2H)-dione, EINECS 207-618-1, 1,2,3-Indantrione, 2-hydrate, 1,2,3-Indantrione monohydrate, Ninhydrin hydrate, Triketohydrindene hydrate (ChemID).