Closantel-(benzoyl ring-<SUP>13</SUP>C<SUB>6</SUB>) CAS 1325559-20-3
| CAS No. | 1325559-20-3 |
| Molecular Formula | C16[13C]6H26Cl2I2N2O2 |
| Molecular Weight | 681.12 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Closantel-(benzoyl ring-<SUP>13</SUP>C<SUB>6</SUB>) (C16[13C]6H26Cl2I2N2O2) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine/iodine substitution. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 681.12 g/mol, it falls into the 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).
Closantel-(benzoyl ring-<SUP>13</SUP>C<SUB>6</SUB>) (CAS 1325559-20-3) is a high-purity analytical reference standard with the molecular formula C16[13C]6H26Cl2I2N2O2 and a molecular weight of 681.12 g/mol.
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
| Molecular Formula | C16[13C]6H26Cl2I2N2O2 |
| Molecular Weight | 681.12 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | Cl/I-containing |
| Nitrogen Atoms | 2 |
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