1,4-Diethynyl-2,5-difluorobenzene CAS 156016-23-8
| CAS No. | 156016-23-8 |
| Molecular Formula | C10H4F2 |
| Molecular Weight | 162.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO supplies 1,4-Diethynyl-2,5-difluorobenzene (CAS 156016-23-8), a certified reference material (molecular formula C10H4F2, MW 162.14 g/mol) for analytical method development and quality control.
Structurally, 1,4-Diethynyl-2,5-difluorobenzene (C10H4F2) contains fluorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 162.14 g/mol, it falls into the medium-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C10H4F2 |
| Molecular Weight | 162.14 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2001 |
| Halogen Content | F-containing |
Related Diethynyl Standards
- 1,5-Diethynyl-2,4-difluorobenzene (CAS 1379822-11-3)
- 1,4-Diethynyl-2,3-difluorobenzene (CAS 1430403-93-2)
- 1,5-Diethynyl-2,4-dimethylbenzene (CAS 1379822-09-9)
- 1,2-diethynyl-4,5-dimethylbenzene (CAS 46037-61-0)
- 1,4-Diethynyl-2,5-dimethylbenzene (CAS 75867-45-7)
- 1,4-Diethynyl-2-nitrobenzene (CAS 113639-27-3)
- Diethynyl(phenyl)phosphine oxide (CAS 37755-67-2)
- 1,4-Diethynyl-2-fluorobenzene (CAS 137000-66-9)
Recommended Standards
- [5-(difluoromethyl)-1-methyl-1h-pyrazol-4-yl]methanol (CAS 1511555-74-0)
- 4-ethoxy-2-hydroxy-4-oxobutanoic acid (CAS 15690-37-6)
- rel-(2R,2'R)-2,2'-Oxydipropionic acid (CAS 14711-85-4)
- Dimethyl 2-hydroxysuccinate (CAS 1587-15-1)
- 8-Chloroquinoline-2,3-dicarboxylic acid (CAS 892874-58-7)
- 1-((5-(Ethoxymethyl)-1,3,4-oxadiazol-2-yl)methyl)-5-methylpyrimidine-2,4(1H,3H)-dione (CAS 1281872-62-5)
- 3-(3-Chloro-phenyl)-isoxazole-5-carboxylic acid (CAS 100517-43-9)
- 1172009-92-5 5-[(3-Methylbenzoyl)amino]pyridine-2-carboxylic acid MFCD14281938 (CAS 1172009-92-5)
- (S,S)-Hydroxy Bupropion (CAS 192374-14-4)
- 2-(1-(2,2,2-Trifluoroacetamido)cyclopentyl)acetic acid (CAS 1343686-08-7)
- Ethyl 6-((3-(tert-butoxy)-3-oxopropyl)amino)-2-(pyridin-2-yl)pyrimidine-4-carboxylate (CAS 1373424-18-0)
- tert-Butyl 3-((4-chlorophenyl)sulfonyl)pyrrolidine-1-carboxylate (CAS 887587-54-4)
- D-erythro-Pentofuranose-2-deoxy-1-acetate-3,5-dibenzoate (CAS 51255-12-0)
- Polymyxin B nonapeptide TFA (CAS 2220175-42-6)
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