4,4′-Difluorobiphenyl CAS 398-23-2
| CAS No. | 398-23-2 |
| Molecular Formula | C12H8F2 |
| Molecular Weight | 190.19 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.
4,4′-Difluorobiphenyl (CAS 398-23-2), molecular formula C12H8F2 and molecular weight 190.19 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 4,4′-Difluorobiphenyl (C12H8F2) 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 190.19 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO manufactures 4,4′-Difluorobiphenyl 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 | C12H8F2 |
| Molecular Weight | 190.19 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | F-containing |
Related Difluorobiphenyl Standards
- 2,3-Difluorobiphenyl (CAS 67277-32-1)
- 3,5-Difluorobiphenyl (CAS 62351-48-8)
- 2,2'-Difluorobiphenyl (PFB 4) 2000 microg/mL in Methyl-tert-butyl ether 1-fluoro-2-(2-fluorophenyl)benzene 2,2'-Difluorobiphenyl 388-82-9 (CAS 388-82-9)
- 2,4-Difluorobiphenyl-3-amine (CAS 1214381-88-0)
- 3',3-Difluorobiphenyl-2-carbaldehyde (CAS 1214354-89-8)
- 3',6-Difluorobiphenyl-2-carbaldehyde (CAS 1214390-07-4)
- (3',2-Difluorobiphenyl-4-yl)methanamine (CAS 1214336-07-8)
- (4',4-Difluorobiphenyl-3-yl)methanol (CAS 1214359-16-6)
Recommended Standards
- (2-Hydroxyethyl) hydrogen adipate (CAS 94109-19-0)
- 3-((Cyanomethyl)amino)-2-methylbenzoicacid (CAS 1000340-07-7)
- Diethyl L-(-)-Malate (CAS 691-84-9)
- 5-Methoxy-7-methyl-1H-indazole-3-carbaldehyde (CAS 1000340-55-5)
- 6-Ethoxy-1,2,3,4-tetrahydroisoquinoline hydrochloride (CAS 63905-72-6)
- (2,5-Dimethylphenyl)(phenyl)methanone (CAS 4044-60-4)
- [(2,6-dimethylphenyl)methyl](2-methylpropyl)amine (CAS 1521977-32-1)
- 2-(4-((2-Chloro-6-fluorobenzyl)oxy)phenyl)acetonitrile (CAS 175135-35-0)
- Potassium Clavulanate EP Impurity L (CAS 4013-94-9)
- 1-[4-(1H-1,2,3,4-tetrazol-5-yl)phenyl]ethan-1-amine (CAS 1249424-31-4)
- (S)-1-N-tert-butoxycarbonyl-3-hydroxypyrrolidine (CAS 101469-92-5)
- Amicoumacin B (CAS 77674-99-8)
- 1-(Difluoromethyl)-5-ethyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid (CAS 677762-86-6)
- Insulin Degludec Impurity 28 (CAS CATO-C4X-215728)
Why CATO?
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