26974-16-3 5-(2-Thienyl)-3-(trifluoromethyl)pyrazole 5-(thiophen-2-yl)-3-(trifluoromethyl)-1H-pyrazole CAS 26974-16-3
| CAS No. | 26974-16-3 |
| Molecular Formula | C8H5F3N2S |
| Molecular Weight | 218.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to a nitrogen-containing heterocyclic scaffold, a nitrile group, sulfur-containing functionality, fluorine substitution, 26974-16-3 5-(2-Thienyl)-3-(trifluoromethyl)pyrazole 5-(thiophen-2-yl)-3-(trifluoromethyl)-1H-pyrazole is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 218.20 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
CATO supplies 26974-16-3 5-(2-Thienyl)-3-(trifluoromethyl)pyrazole 5-(thiophen-2-yl)-3-(trifluoromethyl)-1H-pyrazole (CAS 26974-16-3), a certified reference material (molecular formula C8H5F3N2S, MW 218.20 g/mol) for analytical method development and quality control.
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 | C8H5F3N2S |
| Molecular Weight | 218.20 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1964 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
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Recommended Standards
- trimethyl propane-1,2,3-tricarboxylate (CAS 6138-26-7)
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- Trimethyl Propane-1,2,2-tricarboxylate (CAS 39994-40-6)
- Dimethyl (-)-2,3-O-Isopropylidene-L-tartrate (CAS 37031-29-1)
- 1-(4-{[3-(4-fluorophenyl)-1,2,4-oxadiazol-5-yl]methyl}piperidin-1-yl)-2-(4-methylphenoxy)ethan-1-one (CAS 1775455-69-0)
- 2-(1H-1,2,3-Triazol-1-yl)ethanamine Dihydrochloride (CAS 4320-95-0)
- 3-(3-chlorophenoxy)-2-butanone (CAS 27044-53-7)
- N-(2-Hydroxybenzyl)acetamide (CAS 80311-94-0)
- 4-Fluorophenyl (E)-3-(6-bromo-1,3-benzodioxol-5-yl)-2-propenoate (CAS 478259-09-5)
- 3-bromo-6-chloro-5-nitro-1H-indazole (CAS 1000342-41-5)
- (S)-4-Hydroxypiperidin-2-one (CAS 476014-92-3)
- (4S,7E,9R,10S,13E,15R,16S)-9,15-Dihydroxy-4,10,16-trimethyl-1,5,11-trioxacyclohexadeca-7,13-diene-2,6,12-trione (CAS 172923-77-2)
- Dimethyl 2-Fluoromalonate (CAS 344-14-9)
- Des-Ala35-Tirzepatide (CAS CATO-CPTD788939)
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