4,4'-Difluoro-[1,1'-biphenyl]-2-carboxylic acid CAS 1841-44-7
| CAS No. | 1841-44-7 |
| Molecular Formula | C13H8F2O2 |
| Molecular Weight | 234.20 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 4,4'-Difluoro-[1,1'-biphenyl]-2-carboxylic acid 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.
4,4'-Difluoro-[1,1'-biphenyl]-2-carboxylic acid (CAS 1841-44-7) is a high-purity analytical reference standard with the molecular formula C13H8F2O2 and a molecular weight of 234.20 g/mol.
Structurally, 4,4'-Difluoro-[1,1'-biphenyl]-2-carboxylic acid (C13H8F2O2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, fluorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 234.20 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C13H8F2O2 |
| Molecular Weight | 234.20 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, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | F-containing |
Related Difluoro Standards
- 3',4-Difluoro-[1,1'-biphenyl]-3-carboxylic acid (CAS 1178958-75-2)
- 2',5'-Difluoro-[1,1'-biphenyl]-3-carboxylic acid (CAS 1181291-47-3)
- 4',5-Difluoro-[1,1'-biphenyl]-2-carboxylic acid (CAS 1183606-88-3)
- 2',5-Difluoro-[1,1'-biphenyl]-2-carboxylic acid (CAS 1214335-66-6)
- 3,4'-Difluoro-[1,1'-biphenyl]-2-carboxylic acid (CAS 1214340-15-4)
- 3',5-Difluoro-[1,1'-biphenyl]-3-carboxylic acid (CAS 1214352-53-0)
- 3',6-Difluoro-[1,1'-biphenyl]-3-carboxylic acid (CAS 1214363-82-2)
- 2',3-Difluoro-[1,1'-biphenyl]-2-carboxylic acid (CAS 1214386-61-4)
Recommended Standards
- (3,5-Difluoro-2-hydroxyphenyl)(phenyl)methanone (CAS 183280-20-8)
- Allyl D-glucuronate (CAS 188717-04-6)
- 2-THiocyanato-6-trifluoromethoxy-phenylamine (CAS 1822818-45-0)
- (4-(Difluoromethoxy)-3,5-dimethoxyphenyl)methanol (CAS 926228-70-8)
- 3-Iodoquinolin-5-ol (CAS 1261678-93-6)
- Ethyl 5-(Trifluoromethyl)-3-p-tolylisoxazole-4-carboxylate (CAS 1159978-84-3)
- 3,4-dimethyl-2,3-dihydro-1H-inden-1-one (CAS 35322-82-8)
- (R)-3-(Methylamino)propane-1,2-diol (CAS 254436-44-7)
- 4-chloro-2-nitrobenzoic acid (CAS 6280-88-2)
- Methyl 5-(benzyloxy)pentanoate (CAS 31662-20-1)
- N-(2,4-Dimethoxyphenyl)-2-((4-ethyl-5-(pyridin-2-yl)-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 577981-98-7)
- 2-Phenyl-1h-benzo[d]imidazol-6-amine hydrochloride (CAS 1185070-60-3)
- 2-(3-Piperidinyl)ethyl 2-chloroacetate hydrochloride (CAS 1220020-73-4)
- Pancreatic Polypeptide (human) trifluoroacetate salt (CAS 75976-10-2)
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