Aztreonam USP RC E CAS 99341-02-3
| CAS No. | 99341-02-3 |
| Molecular Formula | C13H17N5O8S2 |
| Molecular Weight | 435.43 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Aztreonam USP RC E (CAS 99341-02-3), molecular formula C13H17N5O8S2 and molecular weight 435.43 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, Aztreonam USP RC E is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 435.43 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C13H17N5O8S2 |
| Molecular Weight | 435.43 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 2 |
Related Aztreonam Standards
- Aztreonam 95%HPLC (CAS 149496-40-2)
- Aztreonam (Anhydrous) (CAS 78110-38-0)
- rac-Aztreonam E Isomer (CAS 91907-97-0)
- Aztreonam Impurity 33 (CAS CATO-C4X-152233)
- Aztreonam impurity 77 (CAS CATO-C4X-152277)
- Aztreonam impurity 86 (CAS CATO-C4X-152286)
- Aztreonam Impurity 14 (CAS CATO-C4X-152214)
- Aztreonam-d6 (CAS 1127452-94-1)
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