Pravastatin EP Impurity A Sodium Salt CAS 81176-41-2
| CAS No. | 81176-41-2 |
| Molecular Formula | C23H35O7 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Pravastatin EP Impurity A Sodium Salt (C23H35O7Na) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
Pravastatin EP Impurity A Sodium Salt (CAS 81176-41-2) is a certified pharmaceutical impurity reference standard with the molecular formula C23H35O7Na and a molecular weight of 446.52 g/mol.
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 | C23H35O7 Na |
| Molecular Weight | 446.52 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| 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) | 6.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1980 |
Related Pravastatin Standards
- Pravastatin-d3 Sodium Salt (major) (CAS 1329836-90-9)
- Pravastatin EP Impurity G (CAS 136590-28-8)
- Pravastatin Lactone Di-(tert-butyldimethylsilyl) Ether (CAS 136980-32-0)
- Pravastatin TMBA Salt (CAS 151006-14-3)
- Pravastatin EP Impurity F Sodium Salt (CAS 151061-28-8)
- Pravastatin EP Impurity C Sodium Salt (CAS 159225-12-4)
- Pravastatin EP Impurity C (CAS 159345-66-1)
- Pravastatin Diol Lactone (CAS 159345-93-4)
Recommended Standards
- Parecoxib Impurity 6 (CAS CATO-C4X-15916)
- Triamterene EP Impurity D (CAS 140-29-4)
- Gliquidone Impurity 6 (CAS 57081-83-1)
- 1-(2-Fluoro-6-(pyrrolidin-1-yl)pyridin-4-yl)-ethanone (CAS 1228665-59-5)
- 4-(Naphthalen-1-ylmethyl)morpholine (CAS 2862-82-0)
- 2-[(3-Methoxyphenoxy)methyl]piperidine 4100AF 946727-56-6 C13H19NO2 (CAS 946727-56-6)
- 5-Chloro-2-methylnicotinonitrile (CAS 1256819-16-5)
- Methyl 7-bromo-1H-benzo[d]imidazole-6-carboxylate (CAS 1803895-46-6)
- 6-Chloro-8-fluoro-3,4-dihydronaphthalen-1(2H)-one (CAS 745784-68-3)
- Biotinyl-S6 Phosphate Acceptor Peptide trifluoroacetate salt (CAS 1815618-12-2)
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