2-Methyl-3,4-dihydro-2H-pyrazolo[1,5-e][1,2,5]thiadiazine-7-carboxylic acid 1,1-dioxide CAS 2138342-58-0
| CAS No. | 2138342-58-0 |
| Molecular Formula | C7H9N3O4S |
| Molecular Weight | 231.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-Methyl-3,4-dihydro-2H-pyrazolo[1,5-e][1,2,5]thiadiazine-7-carboxylic acid 1,1-dioxide (CAS 2138342-58-0), molecular formula C7H9N3O4S and molecular weight 231.23 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system, 2-Methyl-3,4-dihydro-2H-pyrazolo[1,5-e][1,2,5]thiadiazine-7-carboxylic acid 1,1-dioxide is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 231.23 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C7H9N3O4S |
| Molecular Weight | 231.23 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1997 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
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- 2-(Aminomethyl)-3-(difluoromethyl)-6-methoxy-4-nitropyridine (CAS 1805556-08-4)
- 4-(4-Methylthiazol-5-yl)butanoic acid (CAS 273939-94-9)
- 7-Hydroxy-2,2-dimethyl-2H-benzo[b][1,4]oxazin-3(4H)-one (CAS 1226424-90-3)
- Lemborexant impurity 9 (CAS 1369763-94-9)
- Boc-H-Tic(OH)-OH (CAS 142335-42-0)
- [2-31]-Semaglutide C (x TFA Salt) (CAS CATO-C4X-2226118)
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