Etodolac EP Impurity G CAS 57816-83-8
| CAS No. | 57816-83-8 |
| Molecular Formula | C18H23NO3 |
| Molecular Weight | 301.38 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Etodolac EP Impurity G (CAS 57816-83-8), a pharmacopoeial impurity reference standard (molecular formula C18H23NO3, MW 301.38 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C18H23NO3, Etodolac EP Impurity G contains a steroid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 301.38 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
As a certified reference material (CRM), Etodolac EP Impurity G 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 | C18H23NO3 |
| Molecular Weight | 301.38 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| 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 |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1973 |
| Nitrogen Atoms | 1 |
Related Etodolac Standards
- Etodolac EP Impurity K (CAS 122188-02-7)
- Etodolac EP Impurity D (CAS 57917-63-2)
- Etodolac EP Impurity E (CAS 57817-27-3)
- Etodolac EP Impurity F (CAS 849630-65-5)
- 4-Oxo etodolac (CAS 111478-86-5)
- Etodolac Impurity 2 (CAS 101901-06-8)
- Etodolac Impurity 3 (CAS 101901-07-9)
- Etodolac Impurity 1 (CAS 101901-08-0)
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- 2-Hydrazinyl-4-(p-tolyl)-6-(trifluoromethyl)pyrimidine (CAS 861227-55-6)
- 1-(7-Nitro-9,9-dipropyl-9H-fluoren-2-yl)azetidine (CAS 918442-29-2)
- Insulin Degludec Impurity 15 (CAS CATO-C4X-215715)
Why CATO?
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