1-Ethynyl-3-fluoro-2-methylbenzene CAS 1340115-34-5
| CAS No. | 1340115-34-5 |
| Molecular Formula | C9H7F |
| Molecular Weight | 134.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 134.15 g/mol gives 1-Ethynyl-3-fluoro-2-methylbenzene distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
1-Ethynyl-3-fluoro-2-methylbenzene (CAS 1340115-34-5), molecular formula C9H7F and molecular weight 134.15 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 1-Ethynyl-3-fluoro-2-methylbenzene (C9H7F) is characterized by fluorine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C9H7F |
| Molecular Weight | 134.15 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| 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.) | 1991 |
| Halogen Content | F-containing |
Related Ethynyl Standards
- 2-Ethynyl-4-fluoro-1-methylbenzene (CAS 1233512-88-3)
- 2-Ethynyl-1-fluoro-3-methylbenzene (CAS 1279106-21-6)
- 1-Ethynyl-4-fluoro-2-methylbenzene (CAS 1339707-20-8)
- 4-Ethynyl-2-fluoro-1-methylbenzene (CAS 145069-53-0)
- 1-Ethynyl-2-fluoro-4-methylbenzene (CAS 928304-42-1)
- 1-Ethynyl-3-fluoro-5-methylbenzene (CAS 960589-12-2)
- 2-Ethynyl-1-fluoro-4-methylbenzene (CAS 956386-39-3)
- 4-Ethynyl-1-fluoro-2-methylbenzene (CAS 351002-93-2)
Recommended Standards
- (R)-2-Fluoro-4-methylpentanoic acid (CAS 146746-27-2)
- (2S)-2-Fluoro-4-methylpentanoic acid (CAS 126957-44-6)
- (3-fluorooxan-3-yl)methanol (CAS 1554200-18-8)
- 2-Fluorohexanoic acid (CAS 1578-57-0)
- 1-(Bromomethyl)-1-ethoxy-4-methylcyclohexane (CAS 1250765-74-2)
- 1-Bromo-5-fluoro-4-(fluoromethyl)-2-nitrobenzene (CAS 1807004-77-8)
- tert-Butyl (2S,4S)-4-((tert-butyldimethylsilyl)oxy)-2-(hydroxymethyl)pyrrolidine-1-carboxylate (CAS 791602-93-2)
- 2-(2-Methyl-4-(methylsulfonyl)phenoxy)acetic acid (CAS 1368137-95-4)
- 4-(3,4-Difluorophenyl)butan-2-one (CAS 1251925-01-5)
- 2-(3-((((Benzyloxy)carbonyl)amino)methyl)piperidin-1-yl)acetic acid (CAS 1353966-86-5)
- 1,2,4-Trimethoxybenzene (CAS 135-77-3)
- 2-Bromo-1-(4-hydroxy-2-methylphenyl)ethanone (CAS 41877-16-1)
- 5-(6-((2-Fluorobenzyl)thio)pyridazin-3-yl)-2,4-dimethylthiazole (CAS 894006-46-3)
- Insulin Degludec Impurity 24 (CAS CATO-C4X-215724)
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