2-(Methylsulfonyl)phenothiazine 5-Oxide CAS 23503-67-5
| CAS No. | 23503-67-5 |
| Molecular Formula | C13H11NO3S2 |
| Molecular Weight | 293.36 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-(Methylsulfonyl)phenothiazine 5-Oxide (CAS 23503-67-5), molecular formula C13H11NO3S2 and molecular weight 293.36 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 2-(Methylsulfonyl)phenothiazine 5-Oxide (C13H11NO3S2) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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.
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 | C13H11NO3S2 |
| Molecular Weight | 293.36 g/mol |
| 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; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 2 |
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Recommended Standards
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- 2-Chloro-1-(quinolin-6-yl)ethanone (CAS 303967-87-5)
- (Lys7)-Phalloidin trifluoroacetate salt (CAS 1393889-01-4)
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- 3-(Hydroxyamino)propanenitrile (CAS 69622-86-2)
- 2-Fluoro-1-(2,2,2-trifluoroethyl)-4-(trifluoromethyl)benzene (CAS 1099597-72-4)
- 5-Fluoro-1-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-indazole (CAS 2377610-46-1)
- Liraglutide Impurity 16 TFA Salt (CAS CATO-C4X-199216)
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