Piperacillin Monohydrate EP Impurity B CAS 64817-22-7
| CAS No. | 64817-22-7 |
| Molecular Formula | C23H29N5O8S |
| Molecular Weight | 535.57 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.
Piperacillin Monohydrate EP Impurity B (CAS 64817-22-7) is a certified pharmaceutical impurity reference standard with the molecular formula C23H29N5O8S and a molecular weight of 535.57 g/mol.
Based on its molecular formula C23H29N5O8S, Piperacillin Monohydrate EP Impurity B contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 535.57 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C23H29N5O8S |
| Molecular Weight | 535.57 g/mol |
| Purity | >90% |
| 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) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1975 |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 1 |
Related Piperacillin Standards
- Piperacillin Sodium - Impurity B (Freebase) (CAS 2649505-14-4)
- Piperacillin EP Impurity M (CAS 64844-70-8)
- Piperacillin impurity 94 (CAS CATO-C4X-173294)
- Piperacillin impurity 95 (CAS CATO-C4X-173295)
- Piperacillin Impurity 91 (CAS CATO-C4X-173291)
- Piperacillin impurity 99 (CAS CATO-C4X-173299)
- Piperacillin Impurity 51 (CAS CATO-C4X-173251)
- Piperacillin Impurity 27 (CAS 67275-27-8)
Recommended Standards
- Beta-Lactamase (CAS 9073-60-3)
- (11bS)-N-Allyl-N-(9H-fluoren-9-yl)dinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepin-4-amine (CAS 2375836-80-7)
- Dabrafenib Impurity 9 (CAS CATO-C4X-30339)
- Baloxavir defluorinated Impurity 87 (CAS CATO-C4X-210887)
- Exemestane Impurity 33 (CAS CATO-C4X-164133)
- Ibuprofen Impurity 155 (CAS CATO-C4X-1082155)
- Oxazepam impurity 15 (CAS CATO-C4X-309015)
- 4-((3,4-Difluorophenyl)ethynyl)phenol (CAS 331718-48-0)
- 5-Fluoro-4'-(pyrrolidin-1-ylsulfonyl)-[1,1'-biphenyl]-3-ol (CAS 1261999-90-9)
- 3-Hydroxy-1lambda6-thiane-1,1-dione (CAS 94158-05-1)
- 41836-28-6 Tris N,N-bis(trimethylsilyl)amide yttrium (III), min. 98% (99.9%-Y) (REO) (CAS 41836-28-6)
- Flurbiprofen Impurity 88 (CAS 1915720-16-9)
- 1-(3-Chlorophenyl)-3-(1-ethynylcyclohexyl)urea (CAS 42785-87-5)
- Semaglutide impurity 40 (CAS CATO-C4X-222640)
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