Atovaquone CAS 95233-18-4
| CAS No. | 95233-18-4 |
| Molecular Formula | C22H19ClO3 |
| Molecular Weight | 366.84 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Atovaquone (CAS 95233-18-4) is a high-purity analytical reference standard with the molecular formula C22H19ClO3 and a molecular weight of 366.84 g/mol.
Structurally, Atovaquone (C22H19ClO3) contains a steroid core, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 13.0, corresponding to approximately 13 ring(s) or double-bond equivalent(s). With a molecular weight of 366.84 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), Atovaquone meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C22H19ClO3 |
| Molecular Weight | 366.84 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1984 |
| Halogen Content | Cl-containing |
Related Atovaquone Standards
- Atovaquone EP Impurity B (RC A) (CAS 137732-39-9)
- Atovaquone EP Impurity A (CAS 2517583-91-2)
- Atovaquone EP Impurity C (CAS 1809464-27-4)
- cis-Atovaquone-d5 (contains 10% trans isomer) (CAS 1217612-80-0)
- Atovaquone-d5 (CAS 1329792-63-3)
- Atovaquone EP Impurity D (CAS 129700-41-0)
- Atovaquone Impurity 9 (CAS 1100053-58-4)
- Atovaquone Impurity 1 (CAS 49708-81-8)
Recommended Standards
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- 5-Amino-N-(4-ethoxyphenyl)-2-methoxybenzene-1-sulfonamide (CAS 565194-84-5)
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- 3-Methyl-2-((2,2,2-trifluoroethoxy)methyl)butane-1-sulfonyl chloride (CAS 1486306-59-5)
- Insulin Degludec Impurity 20 (CAS CATO-C4X-215720)
Why CATO?
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