2',5'-Dimethyl-1,1':4',1''-terphenyl CAS 20260-22-4
| CAS No. | 20260-22-4 |
| Molecular Formula | C20H18 |
| Molecular Weight | 258.36 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 258.36 g/mol gives 2',5'-Dimethyl-1,1':4',1''-terphenyl distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 2',5'-Dimethyl-1,1':4',1''-terphenyl (CAS 20260-22-4), a certified reference material (molecular formula C20H18, MW 258.36 g/mol) for analytical method development and quality control.
Owing to a polycyclic aromatic system, 2',5'-Dimethyl-1,1':4',1''-terphenyl is typically pale yellow to yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 258.36 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C20H18 |
| Molecular Weight | 258.36 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
Related Dimethyl Standards
- 4-((((1,3-Dimethyl-1h-pyrazol-4-yl)methyl)amino)methyl)-N,N-dimethylaniline (CAS 1006461-43-3)
- 4-({[(1,5-dimethyl-1h-pyrazol-4-yl)methyl]amino}methyl)-n,n-dimethylaniline (CAS 1006959-98-3)
- N-((2,5-Dimethyl-1-phenyl-1h-pyrrol-3-yl)methyl)-2-methoxyethanamine (CAS 1096952-53-2)
- [(dimethyl-1,3-oxazol-2-yl)methyl][1-(4-ethylphenyl)ethyl]amine (CAS 1183362-14-2)
- 2-(3,5-Dimethyl-1H-pyrazol-1-yl)-N,N-diethyl-2H-azepin-7-amine (CAS 193151-02-9)
- 2,2''-Dimethyl-1,1':4',1''-terphenyl (CAS 53092-64-1)
- 3,3-Dimethyl-p-terphenyl (CAS 97295-31-3)
- 4',5'-Dimethyl-1,1':2',1''-terphenyl (CAS 23063-12-9)
Recommended Standards
- 2,5-Diisopropyl-6-methoxyquinolin-8-amine (CAS 685092-62-0)
- 2-[(4R)-4-(1,1-Dimethylethyl)-4,5-dihydro-2-oxazolyl]-5,6,7,8-tetrahydroquinoline (CAS 2375437-25-3)
- 2,5,5-Trimethyl-2-vinyl-3,4,4a,10b-tetrahydro-2H,5H-pyrano[3,2-c]chromene (CAS 464156-17-0)
- 2-Cyclopentyl-1-(4-methoxy-2,3-dimethylphenyl)prop-2-en-1-one (CAS 41715-82-6)
- 2-Fluoro-4-nitro-1-propoxybenzene (CAS 956015-41-1)
- 3-[(6-Iodobenzotriazol-1-yl)methyl]thiane 1,1-dioxide (CAS 2287344-11-8)
- 1-(5-(3-Hydroxy-4-methoxyphenyl)-3-phenyl-4,5-dihydro-1H-pyrazol-1-yl)ethan-1-one (CAS 927140-85-0)
- 2-(Trifluoromethoxy)phenylboronic Acid (CAS 175676-65-0)
- 1-Methoxy-2-propylamine hydrochlorid (CAS 677743-83-8)
- IWR-1 (CAS 1127442-82-3)
- (2-Bromo-6-fluorophenyl)carbamimidothioic Acid Methyl Ester Monohydriodide (CAS 65896-13-1)
- 3-Methoxy-cyclohexylamine hydrochloride (CAS 89854-97-7)
- methyl 3-(5-chloro-3-methyl-1,2-oxazol-4-yl)propanoate (CAS 1240961-14-1)
- Semaglutide Impurity 129 (CAS 2490269-79-7)
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