Ampicillin Impurity 81 CAS CATO-C4X-144381
| CAS No. | CATO-C4X-144381 |
| Molecular Formula | C9H14N2O7S |
| Molecular Weight | 294.28 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Ampicillin Impurity 81.
Ampicillin Impurity 81 (CAS CATO-C4X-144381) is a certified pharmaceutical impurity reference standard with the molecular formula C9H14N2O7S and a molecular weight of 294.28 g/mol.
Based on its molecular formula C9H14N2O7S, Ampicillin Impurity 81 contains a nitrogen-containing heterocyclic scaffold, 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 294.28 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.
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 | C9H14N2O7S |
| Molecular Weight | 294.28 g/mol |
| Purity | ＞90% |
| 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Ampicillin Standards
- Ampicillin EP Impurity J (CAS 6489-58-3)
- Ampicillin Impurity 23 (CAS CATO-C4X-144323)
- Ampicillin Impurity 45 (CAS 336870-02-1)
- Ampicillin Impurity 74 (CAS CATO-C4X-144374)
- Ampicillin Impurity 96 (CAS 35039-72-6)
- Ampicillin Impurity 79 (CAS CATO-C4X-144379)
- Ampicillin Impurity Ⅱ (CAS 26280-46-6)
- Ampicillin Impurity 101 (CAS CATO-C4X-1443101)
Recommended Standards
- Lenvatinib Impurity 39 (CAS CATO-C4X-114039)
- Enoxacin Impurity 4 (CAS 87939-21-7)
- Phenyl (4-(fluorosulfonyl)phenyl)carbamate (CAS 21315-97-9)
- Ethyl 2-(pyrrolidin-1-yl)-4-(trifluoromethyl)thiazole-5-carboxylate (CAS 1000339-79-6)
- Azithromycin Impurity 23 (CAS CATO-C4X-100323)
- Sacubitril Valsartan Sodium Impurity 3 (CAS 1907737-76-1)
- Ibuprofen impurity 118 (CAS CATO-C4X-1082118)
- alpha-3-Pyridyl-alanine (CAS 1213017-27-6)
- (3-OXO-3,4-DIHYDRO-2H-BENZO[B][1,4]THIAZIN-7-YL)BORONIC ACID PINACOL ESTER (CAS 2304634-93-1)
- Methyl 2-(2,3-dichloroquinolin-6-yl)acetate (CAS 1081320-83-3)
- 1-[(3-Amino-4-chlorophenyl)sulfonyl]-4-piperidinol (CAS 1036500-81-8)
- cis-4-amino-3-hydoxy-1-piperidinecarboxylic acid ethyl ester (CAS 84100-53-8)
- Esmolol Impurity 29 (CAS CATO-C4X-189129)
- Semaglutide impurity 331 (CAS CATO-C4X-2226231)
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