CAS: 1752-88-1 Molecular Formula: C3H7ClN2O Molecular Weight (g/mol): 122.55 MDL Number: MFCD00043787 InChI Key: HAYWTXQRYXYRAF-UHFFFAOYSA-N Synonym: 3-pyrazolidinone hydrochloride,pyrazolidin-3-one hydrochloride,4,5-dihydro-1h-pyrazol-3-ol hydrochloride,3-pyrazolidinone, monohydrochloride,tetrahydro-3h-pyrazol-3-one hydrochloride,3-pyrazolidinone hcl,3-pyrazolidone hydrochloride,ksc493k0l,pyrazolidin-3-on-hydrochloride,pyrazolidin-3-one hydrogen chloride PubChem CID: 2733712 SMILES: [H+].[Cl-].O=C1CCNN1