Ampicillin Impurity 43 CAS CATO-C4X-144343
| CAS No. | CATO-C4X-144343 |
| Molecular Formula | C17H19N3O4S |
| Molecular Weight | 361.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Ampicillin Impurity 43 is closely related to a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
As a process- or degradation-related impurity, Ampicillin Impurity 43 (CAS CATO-C4X-144343, C17H19N3O4S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, Ampicillin Impurity 43 (C17H19N3O4S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 361.42 g/mol, it falls into the moderately-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).
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.
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 | C17H19N3O4S |
| Molecular Weight | 361.42 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Ampicillin Standards
- Ampicillin Impurity 37 (CAS CATO-C4X-144337)
- Ampicillin Impurity 90 (CAS CATO-C4X-144390)
- Ampicillin EP Impurity D (CAS 32746-94-4)
- Ampicillin-d5 (CAS 1426173-65-0)
- Ampicillin Impurity 83 (CAS CATO-C4X-144383)
- Ampicillin Impurity 100 (CAS CATO-C4X-1443100)
- Ampicillin EP Impurity C(Isomeric mixture 2) (CAS CATO-C4X-144318)
- Ampicillin EP Impurity B (CAS 19379-33-0)
Recommended Standards
- Cefalexin Impurity 50 (CAS CATO-C4X-126150)
- Lopinavir Related Compounds Mixture (CAS CATO-C4X-168234)
- Cephalexin Impurity 15 (CAS 36114-06-4)
- Methyl trityl-D-serinate (CAS 116457-91-1)
- Pregabalin Impurity 116 (CAS 1101167-84-3（free base）)
- Ursodeoxycholic Acid Impurity 118 (CAS 83896-19-9)
- Glumetinib Impurity 9 (CAS CATO-C4X-32599)
- (S)-2-(4-methylmorpholin-2-yl)ethan-1-amine (CAS 1268520-31-5)
- 6-Methylheptanoic Acid (CAS 929-10-2)
- 5-(4-Benzhydrylpiperazin-1-yl)-1,1,1,2,2-pentafluoropentan-3-ol (CAS 691858-23-8)
- (S)-2-Amino-4-methyl-N-phenylpentanamide (CAS 21930-98-3)
- Methyl 5-(4-methoxybenzyl)-1H-pyrrole-2-carboxylate (CAS 1706446-58-3)
- Ethyl quinoline-8-carboxylate (CAS 25635-22-7)
- Semaglutide impurity 259 (CAS CATO-C4X-2226259)
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