4-(3,4-Dimethyl-6-oxopyrano[2,3-c]pyrazol-1(6H)-yl)benzenesulfonic acid CAS 676246-99-4
| CAS No. | 676246-99-4 |
| Molecular Formula | C14H12N2O5S |
| Molecular Weight | 320.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 4-(3,4-Dimethyl-6-oxopyrano[2,3-c]pyrazol-1(6H)-yl)benzenesulfonic acid (C14H12N2O5S) 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 10.0, corresponding to approximately 10 ring(s) or double-bond equivalent(s). With a molecular weight of 320.32 g/mol, it falls into the moderately-high-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
4-(3,4-Dimethyl-6-oxopyrano[2,3-c]pyrazol-1(6H)-yl)benzenesulfonic acid (CAS 676246-99-4) is a high-purity analytical reference standard with the molecular formula C14H12N2O5S and a molecular weight of 320.32 g/mol.
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), 4-(3,4-Dimethyl-6-oxopyrano[2,3-c]pyrazol-1(6H)-yl)benzenesulfonic acid 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 | C14H12N2O5S |
| Molecular Weight | 320.32 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
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