Atorvastatin Impurity 55 CAS 196085-84-4
| CAS No. | 196085-84-4 |
| Molecular Formula | C14H23NO4 |
| Molecular Weight | 269.34 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Atorvastatin Impurity 55 (CAS 196085-84-4) is a certified pharmaceutical impurity reference standard with the molecular formula C14H23NO4 and a molecular weight of 269.34 g/mol.
The molecular framework of Atorvastatin Impurity 55 (C14H23NO4) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
Physical & Chemical Properties
| Molecular Formula | C14H23NO4 |
| Molecular Weight | 269.34 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 methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2013 |
| Nitrogen Atoms | 1 |
Related Atorvastatin Standards
- Atorvastatin Impurity 87 (CAS 1357600-18-0)
- Atorvastatin Acetonide t-Butyl Ester Side Chain (4R,6R)-Isomer (CAS 125971-94-0)
- Atorvastatin Impurity 63 (CAS 196085-85-5)
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- Atorvastatin Impurity 140 (CAS CATO-C4X-1132140)
- Atorvastatin Impurity 37 (CAS 947586-93-8)
- Atorvastatin Impurity 38 (CAS 1105067-89-7)
- Atorvastatin Impurity 56 (CAS 2088732-01-6)
Recommended Standards
- Mirabegron Impurity 116 (CAS CATO-C4X-1032116)
- 439411S4TB 579-92-0 Diphenylamine-2,2'-dicarboxylic acid Benzoic acid, 2,2'-iminobis- (9CI) Benzoic acid, 2,2'-iminodi- 4-14-00-01058 (Beilstein Handbook Reference) Anthranilic acid, N-(o-carboxyphenyl)- BRN 0483973 2,2'-Dicarboxydiphenylamine 2,2'-Dicarboxyldiphenylamine 2,2'-Diphenylaminedicarboxylic acid 2,2'-Iminodibenzoic acid NSC 27841 Vanadox UNII-439411S4TB (CAS 579-92-0)
- Posaconazole Impurity 80 (CAS CATO-C4X-1208180)
- 543686-58-4 3-Oxo-3-{4-[(2E)-3-phenylprop-2-en-1-yl]piperazin-1-yl}propanenitrile MFCD03367795 (CAS 543686-58-4)
- Nizatidine EP Impurity H (CAS 27366-72-9)
- Cefdinir Impurity 98 (CAS CATO-C4X-121098)
- Risdiplam Impurity 10 (CAS CATO-C4X-301210)
- 5-fluorofuran-2-carbaldehyde (CAS 50899-04-2)
- n-((1,2,3-Thiadiazol-4-yl)methyl)-3-ethoxypropan-1-amine (CAS 1157056-71-7)
- ((1R,3r)-3-(aminomethyl)cyclobutyl)methanol (CAS 1609403-60-2)
- 2-(Difluoromethyl)-5-iodo-6-methylpyridine-3-methanol (CAS 1805092-42-5)
- Strontium hydroxide (CAS 18480-07-4)
- 2-(2-Formyl-6-methylphenoxy)acetonitrile (CAS 303224-34-2)
- Semaglutide impurity 276 (CAS CATO-C4X-2226276)
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