Atenolol EP Impurity A CAS 17194-82-0
| CAS No. | 17194-82-0 |
| Molecular Formula | C8H9NO2 |
| Molecular Weight | 151.16 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 Atenolol EP Impurity A.
CATO supplies Atenolol EP Impurity A (CAS 17194-82-0), a pharmacopoeial impurity reference standard (molecular formula C8H9NO2, MW 151.16 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C8H9NO2, Atenolol EP Impurity A contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 151.16 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
As a certified reference material (CRM), Atenolol EP Impurity A meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C8H9NO2 |
| Molecular Weight | 151.16 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1961 |
| Nitrogen Atoms | 1 |
Related Atenolol Standards
- Atenolol Impurity 12 (CAS 35198-42-6)
- Atenolol USP Related Compound C (CAS 29122-69-8)
- Atenolol Impurity 13 (CAS 72224-25-0)
- Atenolol EP Impurity J (CAS 81346-71-6)
- Atenolol EP Impurity B (CAS 61698-76-8)
- Atenolol Impurity 14 (CAS 142037-04-5)
- Atenolol impurity 28 (CAS CATO-C4X-154928)
- Atenolol Impurity 25 (CAS CATO-C4X-154925)
Recommended Standards
- Pregabalin Impurity 63 (CAS 7214-61-1)
- Lidocaine Impurity 45 (CAS 89-58-7)
- Cefaclor EP Impurity A (CAS 875-74-1)
- Lidocaine Impurity 49 (CAS 81-20-9)
- Piperacillin Impurity 20 (CAS CATO-C4X-173220)
- Ixazomib Impurity 23 (CAS CATO-C4X-126723)
- Plerixafor Impurity 16 (CAS CATO-C4X-113316)
- 5-Bromo-4-iodo-1H-1,2,3-triazole (CAS 2566600-08-4)
- 3-Iodo-7-methoxy-4H-chromen-4-one (CAS 73220-42-5)
- (S)-3-(2-ethoxyethoxy)pyrrolidine (CAS 880361-92-2)
- 5-(Phenylsulfonyl)thiophene-2-sulfonyl chloride (CAS 166964-37-0)
- Ac-Ser(tBu)-OH (CAS 77285-09-7)
- N-(4-Fluorophenyl)-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzamide (CAS 850567-58-7)
- Semaglutide impurity 261 (CAS CATO-C4X-2226261)
Why CATO?
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