Atenolol Impurity 25 CAS CATO-C4X-154925
| CAS No. | CATO-C4X-154925 |
| Molecular Formula | C13H19NO3 |
| Molecular Weight | 237.29 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.
Atenolol Impurity 25 (CAS CATO-C4X-154925) is a certified pharmaceutical impurity reference standard with the molecular formula C13H19NO3 and a molecular weight of 237.29 g/mol.
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, Atenolol Impurity 25 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 237.29 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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 | C13H19NO3 |
| Molecular Weight | 237.29 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Atenolol Standards
- Atenolol impurity 28 (CAS CATO-C4X-154928)
- Atenolol EP Impurity D (CAS 115538-83-5)
- Atenolol EP Impurity H (CAS 29277-73-4)
- Atenolol Impurity 14 (CAS 142037-04-5)
- Atenolol EP Impurity B (CAS 61698-76-8)
- Atenolol EP Impurity J (CAS 81346-71-6)
- Atenolol EP Impurity I (CAS 1797116-92-7)
- Atenolol impurity 27 (CAS CATO-C4X-154927)
Recommended Standards
- Bisoprolol EP Impurity L(Metoprolol EP Impurity C) (CAS 29122-74-5)
- Verapamil Impurity 52 (CAS CATO-C4X-177852)
- Terbutaline impound 95 (CAS CATO-C4X-118395)
- Tetracaine Impurity 21 (CAS CATO-C4X-192321)
- Ibuprofen Impurity (CAS 1314907-71-5)
- Cefmetazole Impurity 36 (CAS CATO-C4X-150736)
- Rivaroxaban Impurity N3 (CAS 1252018-10-2)
- Ethyl 6-chloro-2-oxo-2H-chromene-3-carboxylate (CAS 70384-80-4)
- 8-Amino-3-methyl-7-(2-methylallyl)-3,7-dihydro-1H-purine-2,6-dione (CAS 332099-04-4)
- Methyl 1-(aminomethyl)cyclopent-3-ene-1-carboxylate (CAS 1479335-31-3)
- 1,9-Nonanediol (CAS 3937-56-2)
- 2,2'-((Cyclohexane-1,2-diylbis(azanediyl))bis(carbonyl))dibenzoic acid (CAS 446826-08-0)
- 2-Bromo-4-phenylpyrimidine (CAS 10198-98-8)
- Semaglutide impurity 87 (CAS CATO-C4X-222687)
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