5-(1-Methyl-1h-pyrazol-5-yl)thiophene-2-carboxylic acid CAS 656226-60-7
| CAS No. | 656226-60-7 |
| Molecular Formula | C9H8N2O2S |
| Molecular Weight | 208.24 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 5-(1-Methyl-1h-pyrazol-5-yl)thiophene-2-carboxylic acid.
CATO supplies 5-(1-Methyl-1h-pyrazol-5-yl)thiophene-2-carboxylic acid (CAS 656226-60-7), a certified reference material (molecular formula C9H8N2O2S, MW 208.24 g/mol) for analytical method development and quality control.
Structurally, 5-(1-Methyl-1h-pyrazol-5-yl)thiophene-2-carboxylic acid (C9H8N2O2S) 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 208.24 g/mol, it falls into the medium-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.
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.
CATO manufactures 5-(1-Methyl-1h-pyrazol-5-yl)thiophene-2-carboxylic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C9H8N2O2S |
| Molecular Weight | 208.24 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Recommended Standards
- 5-(1-Methyl-1H-imidazol-2-yl)thiophene-2-carboxylic acid (CAS 914637-30-2)
- 5-(2,4-Dimethylpyrimidin-5-yl)-1,3,4-oxadiazole-2(3H)-thione (CAS 88317-49-1)
- 5-((5-Methylthiophen-3-yl)oxy)pyrimidin-2(1H)-one (CAS 96518-97-7)
- 5-(2-Methoxyphenyl)-1,3,4-oxadiazole-2-thiol (CAS 69844-25-3)
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- Serpent Peptide 2AcOH (CAS 823202-99-9(free base))
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