Mometasone Impurity 43 CAS CATO-C4X-170443
| CAS No. | CATO-C4X-170443 |
| Molecular Formula | C32H31ClO8 |
| Molecular Weight | 579.04 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Mometasone Impurity 43.
Mometasone Impurity 43 (CAS CATO-C4X-170443) is a certified pharmaceutical impurity reference standard with the molecular formula C32H31ClO8 and a molecular weight of 579.04 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, a polycyclic aromatic system, Mometasone Impurity 43 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 579.04 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C32H31ClO8 |
| Molecular Weight | 579.04 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 17.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
Related Mometasone Standards
- Mometasone Furoate EP Impurity R (CAS 1370190-08-1)
- Mometasone Furoate EP Impurity I (CAS CATO-C4X-170410)
- Mometasone Impurity 32 (CAS CATO-C4X-170432)
- Mometasone Furoate EP Impurity B (CAS 223776-49-6)
- Mometasone Furoate EP Impurity T (CAS CATO-C4X-170420)
- Mometasone Impurity 38 (CAS CATO-C4X-170438)
- Mometasone Furoate Impurity 23 (CAS 83897-05-6)
- Mometasone Impurity 44 (CAS CATO-C4X-170444)
Recommended Standards
- Lapatinib Impurity 35 (CAS 1227853-06-6)
- Latamoxef Impurity 21 (CAS CATO-C4X-179821)
- Lapatinib Impurity 34 (CAS 1807733-95-4)
- Fluticasone Impurity 94 (CAS CATO-C4X-165094)
- Perindopril EP Impurity B (CAS 95153-31-4)
- Etoposide Impurity 23 (CAS 101648-63-9)
- Icatibant Impurity 5 Acetate (CAS CATO-C4X-23615)
- 5-(tert-Butyl)nicotinimidamide hydrochloride (CAS 2089327-51-3)
- 2-(4-Methoxyphenyl)-1,3-benzoxazole (CAS 838-34-6)
- (R)-2-Bromo-1-(2-methoxyphenyl)ethan-1-ol (CAS 1212339-30-4)
- Etoposide Impurity 28 (CAS CATO-C4X-202428)
- Neostigmine impurity 43 (CAS 2768847-25-0)
- 3-(Methylthio)-4-nitrophenol (CAS 771-94-8)
- 30003-72-6 insulin chain b oxidized (CAS 30003-72-6)
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