Mycophenolate Impurity 20 CAS 27979-57-3
| CAS No. | 27979-57-3 |
| Molecular Formula | C9H8O4 |
| Molecular Weight | 180.16 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Mycophenolate Impurity 20 (C9H8O4) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 180.16 g/mol, it falls into the medium-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).
As a process- or degradation-related impurity, Mycophenolate Impurity 20 (CAS 27979-57-3, C9H8O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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.
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 | C9H8O4 |
| Molecular Weight | 180.16 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1964 |
Related Mycophenolate Standards
- Mycophenolate Mofetil Impurity 14 (CAS 33431-38-8)
- Mycophenolate Mofetil Impurity 15 (CAS 24243-38-7)
- Mycophenolate Mofetil EP Impurity H (CAS 79081-87-1)
- Mycophenolate Mofetil EP Impurity H (CAS 26675-76-3)
- Mycophenolate EP Impurity B (CAS 2767988-82-7)
- Mycophenolate Impurity 22 (CAS CATO-C4X-151522)
- Mycophenolate Impurity 24 (CAS CATO-C4X-151524)
- Mycophenolate Mofetil EP Impurity E (CAS 31858-66-9)
Recommended Standards
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- Doxazosin EP Impurity A (CAS 3663-80-7)
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- Afoxolaner Impurity 12 (CAS CATO-C4X-313712)
- Cefodizime Impurity 22 (CAS CATO-C4X-180622)
- Pinaverium Bromide Impurity 42 (CAS CATO-C4X-246742)
- 2-(Benzylsulfanyl)-2,3-dihydro-1h-isoindole-1,3-dione (CAS 14204-26-3)
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- 1-(1,3-Oxathiolan-2-yl)propane-2-thiol (CAS 95792-16-8)
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- Peptide YY (3-36) (canine, mouse, porcine, rat) trifluoroacetate salt (CAS 126339-09-1)
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