3,3'-Dichloro-2,2'-dimethyl-1,1'-biphenyl CAS 19482-21-4
| CAS No. | 19482-21-4 |
| Molecular Formula | C14H12Cl2 |
| Molecular Weight | 251.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 3,3'-Dichloro-2,2'-dimethyl-1,1'-biphenyl is closely related to chlorine substitution, a polycyclic aromatic system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
3,3'-Dichloro-2,2'-dimethyl-1,1'-biphenyl (CAS 19482-21-4), molecular formula C14H12Cl2 and molecular weight 251.15 g/mol, is a CATO reference standard with documented purity and traceability.
3,3'-Dichloro-2,2'-dimethyl-1,1'-biphenyl (C14H12Cl2) contains chlorine substitution, a polycyclic aromatic system. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C14H12Cl2 |
| Molecular Weight | 251.15 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.) | 1962 |
| Halogen Content | Cl-containing |
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Recommended Standards
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- 1,1,1,3,3,3-Hexafluoro-2-(1,3-thiazol-2-yl)propan-2-ol (CAS 362718-79-4)
- 6,11-Dihydrobenzo[b]acridine-12-carboxylic acid (CAS 351000-55-0)
- tert-Butyl 5-methoxy-3,4-dihydroisoquinoline-2(1H)-carboxylate (CAS 860436-56-2)
- 2-{[(9H-fluoren-9-ylmethoxy)carbonyl]amino}-5-methoxypentanoic acid (CAS 1483389-52-1)
- (3-(Dipropylcarbamoyl)phenyl)boronic acid (CAS 850567-39-4)
- 3,5-Dimethylphenylzinc iodide 0.5 M in Tetrahydrofuran (CAS 312693-11-1)
- (2S,6R)-2,6-dimethylpiperidin-4-ol (CAS 73753-74-9)
- 3,4-Dimethoxybenzohydrazide (CAS 41764-74-3)
- 3-Fluoro-N-(2-(piperidin-1-yl)-3-(thiophen-2-yl)quinoxalin-6-yl)benzamide (CAS 832081-98-8)
- 2-((1-Methylpiperidin-3-yl)methoxy)ethanamine (CAS 1353946-95-8)
- Semaglutide impurity 227 (CAS CATO-C4X-2226227)
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