4-((4-Ethylphenyl)ethynyl)-1,2-difluorobenzene CAS 145698-42-6
| CAS No. | 145698-42-6 |
| Molecular Formula | C16H12F2 |
| Molecular Weight | 242.26 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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 supplies 4-((4-Ethylphenyl)ethynyl)-1,2-difluorobenzene (CAS 145698-42-6), a certified reference material (molecular formula C16H12F2, MW 242.26 g/mol) for analytical method development and quality control.
Owing to fluorine substitution, a polycyclic aromatic system, 4-((4-Ethylphenyl)ethynyl)-1,2-difluorobenzene is typically pale yellow to yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 242.26 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).
As a certified reference material (CRM), 4-((4-Ethylphenyl)ethynyl)-1,2-difluorobenzene 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 | C16H12F2 |
| Molecular Weight | 242.26 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1998 |
| Halogen Content | F-containing |
Related Ethylphenyl Standards
- 2-[(4-Ethylphenyl)amino]nicotinic acid (CAS 55285-32-0)
- n-(2-Ethylphenyl)-6-oxo-1,6-dihydropyridine-3-carboxamide (CAS 923755-92-4)
- n-(3-Ethylphenyl)-6-oxo-1,6-dihydropyridine-3-carboxamide (CAS 923674-78-6)
- 3-((4-Ethylphenyl)sulfonyl)propanoic acid (CAS 200643-81-8)
- 5-(4-Ethylphenyl)-1-vinyl-1H-pyrrole-2-carboxylic acid (CAS 131172-67-3)
- 1-(2-(4-Ethylphenyl)-2-oxoethyl)pyridin-2(1h)-one (CAS 925401-49-6)
- N-(4-Ethylphenyl)-4-fluorobenzamide (CAS 101398-04-3)
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Recommended Standards
- 1-(4-Butoxy-3,5-difluorophenyl)propan-1-one (CAS 1443355-70-1)
- 2,3,4,5-Tetrahydro-3-phenyl-1H-1,5,3-benzodiazaphosphepine (CAS 82409-33-4)
- 1-(3,5-Difluoro-4-(pentyloxy)phenyl)ethan-1-one (CAS 1443349-97-0)
- 5-(2-thiazol-2-ylethynyl)isoxazolo[5,4-b]pyridin-3-amine (CAS 2630301-45-8)
- 3-[4-Fluoro-3-(trifluoromethyl)phenyl]azetidin-3-ol (CAS 1691633-63-2)
- 2-((5-Methylisoxazol-3-yl)methylene)hydrazinecarboxamide (CAS 89727-83-3)
- 4-Fluoro-3-methyl-2H-indazole (CAS 1145777-43-0)
- (±)-Norephedrine-gamma,gamma,gamma-d3 HCl (CAS 345909-04-8)
- 3-Amino-N-(2,4-dimethylphenyl)-4-methylbenzene-1-sulfonamide (CAS 326023-20-5)
- 3-((3-Chloro-4-methylphenyl)amino)-1-(naphthalen-2-yl)propan-1-one (CAS 477334-06-8)
- (R)-3-Amino-4-(2-thienyl)butanoicacidhydrochloride (CAS 269726-88-7)
- 4-Bromo-5-fluoro-2-methoxyphenol (CAS 886510-25-4)
- N-(1-Acetyl-3,5-dimethyl-1H-pyrazol-4-yl)acetamide (CAS 299421-84-4)
- Semaglutide Impurity 9 (CAS CATO-C4X-22269)
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