Aztreonam Impurity 4 CAS 102507-85-7
| CAS No. | 102507-85-7 |
| Molecular Formula | C9H11N3O5S |
| Molecular Weight | 273.27 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Aztreonam Impurity 4 (CAS 102507-85-7) is a certified pharmaceutical impurity reference standard with the molecular formula C9H11N3O5S and a molecular weight of 273.27 g/mol.
Structurally, Aztreonam Impurity 4 (C9H11N3O5S) 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 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 273.27 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
As a certified reference material (CRM), Aztreonam Impurity 4 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 | C9H11N3O5S |
| Molecular Weight | 273.27 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Aztreonam Standards
- Aztreonam impurity 103 (CAS 2304883-18-7)
- Aztreonam impurity 71 (CAS CATO-C4X-152271)
- Aztreonam impurity 91 (CAS 80082-50-4)
- Aztreonam impurity 76 (CAS CATO-C4X-152276)
- Aztreonam impurity 74 (CAS CATO-C4X-152274)
- Aztreonam impurity 69 (CAS CATO-C4X-152269)
- Aztreonam impurity 98 (CAS 71780-86-4)
- Aztreonam USP RC D (CAS 102579-59-9)
Recommended Standards
- Cefoxitin Impurity 33 (CAS CATO-C4X-157833)
- Cefuroxime Impurity 26 (CAS 37051-07-3)
- Ceftolozane impurity 5 (CAS 1956303-48-2)
- Ceftazidime Impurity 38 Mixture (CAS 91999-75-6)
- Azilsartan Impurity 77 (CAS CATO-C4X-109677)
- Azelastine Impurity 48 (CAS CATO-C4X-139648)
- Citalopram Impurity 55 (CAS CATO-C4X-110955)
- 1-(5-Bromofuran-2-yl)propan-1-one (CAS 99834-94-3)
- 2-Aminodecahydronaphthalene-2-carboxylic acid (CAS 18672-74-7)
- (E)-N'-Benzylidene-2-(4-chlorophenoxy)acetohydrazide (CAS 1351480-52-8)
- 3-(1-Methyl-1h-pyrazol-4-yl)-5-propylisoxazole-4-carboxylic acid (CAS 1410331-51-9)
- Landiolol Impurity 16 (CAS 17362-17-3)
- 4-(chlorosulfonyl)-3-methylbenzoic acid (CAS 1314960-92-3)
- Tau Peptide (307-321) trifluoroacetate salt (CAS 330456-50-3)
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