4,4''-Diethynyl-3',4',5',6'-tetrakis(4-ethynylphenyl)-1,1':2',1''-terphenyl CAS 252238-71-4
| CAS No. | 252238-71-4 |
| Molecular Formula | C54H30 |
| Molecular Weight | 678.82 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 4,4''-Diethynyl-3',4',5',6'-tetrakis(4-ethynylphenyl)-1,1':2',1''-terphenyl.
4,4''-Diethynyl-3',4',5',6'-tetrakis(4-ethynylphenyl)-1,1':2',1''-terphenyl (CAS 252238-71-4) is a high-purity analytical reference standard with the molecular formula C54H30 and a molecular weight of 678.82 g/mol.
Structurally, 4,4''-Diethynyl-3',4',5',6'-tetrakis(4-ethynylphenyl)-1,1':2',1''-terphenyl (C54H30) contains a polycyclic aromatic system. The molecule exhibits a degree of unsaturation (DBE) of 40.0, corresponding to approximately 40 ring(s) or double-bond equivalent(s). With a molecular weight of 678.82 g/mol, it falls into the high-molecular-weight range. 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 | C54H30 |
| Molecular Weight | 678.82 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 40.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
Related Diethynyl Standards
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- 2,2'-((((2,5-Diethynyl-1,4-phenylene)bis(oxy))bis(ethane-2,1-diyl))bis(oxy))bis(ethan-1-ol) (CAS 321673-10-3)
- 1,4-Diethynyl-2,5-bis(hexyloxy)benzene (CAS 128424-37-3)
- 15,16-Diethynyl-2,3,5,6,8,9,11,12-octahydrobenzo[b][1,4,7,10,13]pentaoxacyclopentadecine (CAS 680573-26-6)
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Recommended Standards
- 1,3,5-Tri(pyren-1-yl)benzene (CAS 349666-25-7)
- Difelikefalin Impurity 34 (CAS CATO-C4X-304134)
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- Galnon (CAS 475115-35-6)
- 4-Fluoro-2-(1-methyl-1H-pyrazol-5-yl)phenol (CAS 771483-74-0)
- Isoquinoline-3-carboximidamide hydrochloride (CAS 1179362-42-5)
- 3-Ethyl-2-((2-(4-methylpiperidin-1-yl)-2-oxoethyl)thio)-3,5,6,7-tetrahydro-4H-cyclopenta[4,5]thieno[2,3-d]pyrimidin-4-one (CAS 483976-40-5)
- 6-Methoxyoxindole (CAS 7699-19-6)
- Methyl 2-(chloromethyl)-1,3-benzoxazole-6-carboxylate (CAS 937601-76-8)
- 4-(1',5'-dimethyl-1H,1'H-3,4'-bipyrazol-1-yl)aniline,HCl (CAS 1431965-14-8)
- 3-Bromo-5-((4-ethylpiperazin-1-yl)sulfonyl)pyridine-4-thiol (CAS 1352508-03-2)
- 1-Tosyl-3-pyrrolidinol (CAS 170456-83-4)
- 1-Benzyl-3-chloro-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-4-(trimethylsilyl)pyridin-2(1H)-one (CAS 1010101-15-1)
- Tetrapeptide-3 (CAS 827306-97-8)
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