Parecoxib Impurity 44 CAS 2338845-31-9
| CAS No. | 2338845-31-9 |
| Molecular Formula | C32H24N2O4S |
| Molecular Weight | 532.61 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Parecoxib Impurity 44 (CAS 2338845-31-9) is a certified pharmaceutical impurity reference standard with the molecular formula C32H24N2O4S and a molecular weight of 532.61 g/mol.
Structurally, Parecoxib Impurity 44 (C32H24N2O4S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 22.0, corresponding to approximately 22 ring(s) or double-bond equivalent(s). With a molecular weight of 532.61 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
As a certified reference material (CRM), Parecoxib Impurity 44 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C32H24N2O4S |
| Molecular Weight | 532.61 g/mol |
| Purity | >95% |
| 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 |
| Degree of Unsaturation (DBE) | 22.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1999 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Parecoxib Standards
- Parecoxib sodium Impurity 11 (CAS 1708094-99-8)
- Parecoxib Impurity 27 (CAS CATO-C4X-159127)
- Parecoxib Impurity 38 (CAS CATO-C4X-159138)
- Parecoxib Impurity 68 (CAS 1373038-60-8)
- Parecoxib Impurity 37 (CAS CATO-C4X-159137)
- Parecoxib Impurity 74 (CAS CATO-C4X-159174)
- Parecoxib Impurity 35 (CAS 1373038-63-1)
- Parecoxib Impurity 60 (CAS CATO-C4X-159160)
Recommended Standards
- Sildenafil Impurity 33 (CAS CATO-C4X-112833)
- Roridin A (CAS 14729-29-4)
- Oprozomib (CAS 935888-69-0)
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- Baloxavir Impurity 3 (CAS 1985606-14-1)
- Biperiden EP Impurity E (CAS 2832847-11-5)
- Aprepitant Impurity 4 (CAS 172822-29-6)
- 6-Bromo-4-hydroxyquinazoline (CAS 32084-59-6)
- 2,5-Dibromo-4-ethoxypyridine (CAS 52311-22-5)
- N-Ethyl-m-toluidine (CAS 102-27-2)
- 2-(Quinolin-2-yl)phenol (CAS 42731-96-4)
- <SC>L</SC>-Selenomethionine-methyl-<SUP>13</SUP>C<SUB>1</SUB> (CAS 1217470-45-5)
- Desdiacetyl-8-oxo Famciclovir (CAS 166197-79-1)
- Tirzepatide Impurity 12 (CAS CATO-C4X-324012)
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