Betamethasone Impurity 50 CAS 1203841-45-5
| CAS No. | 1203841-45-5 |
| Molecular Formula | C21H27FO4 |
| Molecular Weight | 362.44 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C21H27FO4, Betamethasone Impurity 50 contains a flavonoid core, a hydroxyl group, an ether linkage, fluorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 362.44 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Betamethasone Impurity 50 (CAS 1203841-45-5) is a certified pharmaceutical impurity reference standard with the molecular formula C21H27FO4 and a molecular weight of 362.44 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.
CATO manufactures Betamethasone Impurity 50 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C21H27FO4 |
| Molecular Weight | 362.44 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Halogen Content | F-containing |
Related Betamethasone Standards
- Betamethasone Impurity 128 (CAS CATO-C4X-1437128)
- Betamethasone Impurity 129 (CAS CATO-C4X-1437129)
- Betamethasone impurity 73 (CAS 1203841-43-3)
- Betamethasone Impurity 75 (CAS CATO-C4X-143775)
- Betamethasone Impurity 94 (CAS 19784-87-3)
- Betamethasone EP Impurity J (CAS 18383-24-9)
- Betamethasone EP Impurity C (CAS 13504-15-9)
- Betamethasone EP Impurity F (CAS 330157-04-5)
Recommended Standards
- Raloxifene Impurity 3 (CAS 1677681-02-5)
- Nilotinib Impurity 13 (CAS CATO-C4X-125613)
- Desmethyl Fluorometholone (CAS 426-20-0)
- Dexamethasone impurity 89 (CAS CATO-C4X-116589)
- Etoricoxib Impurity 45 (CAS 855307-80-1)
- Tizanidine EP Impurity D HI (CAS 51323-03-6)
- Argatroban Impurity 4 (CAS CATO-C4X-10074)
- 1-{2-[(4-bromobenzene)sulfonyl]ethyl}piperidin-4-ol (CAS 1000927-51-4)
- tert-Butyl 4-hydroxy-2-methylpiperidine-1-carboxylate (CAS 208046-23-5)
- Mirabegron Impurity 5 (CAS CATO-C4X-10325)
- 1-bromo-4-fluoro-cyclohexane (CAS 1780553-11-8)
- (S)-Methyl 2-(1,8-diethyl-1,3,4,9-tetrahydropyrano[3,4-b]indol-1-yl)acetate (CAS 200880-31-5)
- 4-Chloro-3-cyclopropoxybenzaldehyde (CAS 1243384-90-8)
- Neuropeptide Y (porcine) trifluoroacetate salt (CAS 83589-17-7)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com