CAS: 485-47-2 Molecular Formula: C9H6O4 Molecular Weight (g/mol): 178.143 InChI Key: FEMOMIGRRWSMCU-UHFFFAOYSA-N Synonym: ninhydrin,ninhydrin hydrate,1,2,3-indantrione monohydrate,ninhydrine,2,2-dihydroxy-1h-indene-1,3 2h-dione,2,2-dihydroxy-1,3-indandione,triketohydrindene hydrate,1h-indene-1,3 2h-dione, 2,2-dihydroxy,1,2,3-indantrione, 2-hydrate,2,2-dihydroxyindane-1,3-dione PubChem CID: 10236 ChEBI: CHEBI:86374 IUPAC Name: 2,2-dihydroxyindene-1,3-dione SMILES: C1=CC=C2C(=C1)C(=O)C(C2=O)(O)O