7,9-Dichloro-2,3-dihydro-1H-cyclopenta[b]quinoline CAS 40528-04-9

Description

The occurrence of 7,9-Dichloro-2,3-dihydro-1H-cyclopenta[b]quinoline is closely related to a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.

7,9-Dichloro-2,3-dihydro-1H-cyclopenta[b]quinoline (CAS 40528-04-9), molecular formula C12H9Cl2N and molecular weight 238.11 g/mol, is a CATO reference standard with documented purity and traceability.

Structurally, 7,9-Dichloro-2,3-dihydro-1H-cyclopenta[b]quinoline (C12H9Cl2N) contains a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 238.11 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

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