Atorvastatin Impurity 37 CAS 63423-96-1
| CAS No. | 63423-96-1 |
| Molecular Formula | C5H8NS |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Atorvastatin Impurity 37 is closely related to a nitrile group, sulfur-containing functionality, bromine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Atorvastatin Impurity 37 (CAS 63423-96-1), molecular formula C5H8NSBr and molecular weight 194.09 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a nitrile group, sulfur-containing functionality, bromine substitution, Atorvastatin Impurity 37 is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 194.09 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C5H8NS Br |
| Molecular Weight | 194.09 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1975 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Atorvastatin Standards
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- Atorvastatin Lactam calcium Salt Impurity (CAS 1046118-41-5)
- Atorvastatin Impurity 86 (CAS 1046118-44-8)
- Atorvastatin Impurity 141 Calcium Salt (CAS 1046378-58-8)
- Atorvastatin Impurity 76 (CAS 1099474-28-8)
- Atorvastatin EP Impurity F(Calcium Salt) (CAS 1105067-87-5)
Recommended Standards
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- 3,4,5-Triphenylisoxazole (CAS 22020-72-0)
- Uridine Diphosphate Choline Ammonium Salt (CAS CATO-C3D-3858)
- 8-Fluoro-2,3-dihydrobenzo[4,5]imidazo[2,1-b]thiazole (CAS 121712-06-9)
- 2-(1H-Benzo[d]imidazol-1-yl)-N-(2-ethyl-6-methylphenyl)-N-(1-methoxypropan-2-yl)acetamide (CAS 612046-31-8)
- 3-(Dimethylsulfamoyl)-4-fluorobenzoic acid (CAS 381229-72-7)
- 6-Methoxy-2-propylquinoline-4-carbothioamide (CAS 62078-04-0)
- [His]1+12-Semaglutide (CAS CATO-C4X-2226178)
Why CATO?
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