3-Oxo-3,4-dihydro-2H-benzo[b][1,4]thiazine-6-carboxylic acid CAS 272437-84-0
| CAS No. | 272437-84-0 |
| Molecular Formula | C9H7NO3S |
| Molecular Weight | 209.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 3-Oxo-3,4-dihydro-2H-benzo[b][1,4]thiazine-6-carboxylic acid (C9H7NO3S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 209.22 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
3-Oxo-3,4-dihydro-2H-benzo[b][1,4]thiazine-6-carboxylic acid (CAS 272437-84-0), molecular formula C9H7NO3S and molecular weight 209.22 g/mol, is a CATO reference standard with documented purity and traceability.
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 | C9H7NO3S |
| Molecular Weight | 209.22 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Oxo Standards
- 3-Oxo-3,4-dihydro-2H-benzo[b][1,4]thiazine-7-carboxylic acid (CAS 1094107-96-6)
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- 2-(3-Oxo-2,3-dihydro-1,2-benzothiazol-2-yl)acetic acid (CAS 82152-06-5)
- 1,3-Dihydro-1-d5-phenyl-2H-indol-2-one (CAS 1189871-32-6)
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- 5-((4,5-Dihydro-1H-imidazol-2-yl)amino)benzene-1,2,3-triol (CAS 91147-42-1)
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Recommended Standards
- 3-Methyl-5-oxo-5H-thiazolo[3,2-a]pyridine-8-carboxylic acid (CAS 2387599-92-8)
- 4-(4-Amino-2-fluorophenyl)-2-piperazinone (CAS 850369-93-6)
- 3-Methyl-5-oxo-5H-thiazolo[3,2-a]pyridine-7-carboxylic acid (CAS 2387597-34-2)
- 4-(4-Fluoropyrrolidin-3-yl)benzoic acid (CAS 2167667-62-9)
- (1S,2S)-2-(o-tolyl)cyclopropane-1-carboxylic acid (CAS 705250-88-0)
- Indolin-6-ol hydrochloride (CAS 19727-91-4)
- Hexafluoroacetone Trihydrate (CAS 34202-69-2)
- 2-(4-Ethyl-3,5-dimethyl-1H-pyrazol-1-yl)-propanamide (CAS 1217862-61-7)
- 2,2'-Dimethyl-[1,1'-biphenyl]-4-carboxylic acid (CAS 69535-85-9)
- 1,5-Diphenyl-1H-pyrazole (CAS 6831-89-6)
- 5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)furan-3-carboxylic acid (CAS 1073354-94-5)
- Methyl 2-hydroxy-5-iodo-4-(trifluoromethyl)benzoate (CAS 1131587-48-8)
- 2-[(1,2,4-Triazol-1-yl)methyl]aniline (CAS 127988-21-0)
- Liraglutide Impurity 19 TFA Salt (CAS CATO-C4X-199219)
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