rac-Levothyroxine EP Impurity J (3,3'-DL-Diiodothyronine) CAS 70-40-6

Description

Compared with other compounds in its class, the molecular weight of 525.08 g/mol gives rac-Levothyroxine EP Impurity J (3,3'-DL-Diiodothyronine) distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

rac-Levothyroxine EP Impurity J (3,3'-DL-Diiodothyronine) (CAS 70-40-6), molecular formula C15H13I2NO4 and molecular weight 525.08 g/mol, is a CATO reference standard with documented purity and traceability.

Structurally, rac-Levothyroxine EP Impurity J (3,3'-DL-Diiodothyronine) (C15H13I2NO4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, iodine substitution. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 525.08 g/mol, it falls into the moderately-high-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

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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