2,5-Dichloro-p-terphenyl CAS 61576-86-1
| CAS No. | 61576-86-1 |
| Molecular Formula | C18H12Cl2 |
| Molecular Weight | 299.19 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
CATO supplies 2,5-Dichloro-p-terphenyl (CAS 61576-86-1), a certified reference material (molecular formula C18H12Cl2, MW 299.19 g/mol) for analytical method development and quality control.
The molecular framework of 2,5-Dichloro-p-terphenyl (C18H12Cl2) is characterized by chlorine substitution, a polycyclic aromatic system. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
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 | C18H12Cl2 |
| Molecular Weight | 299.19 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 |
| Stability | May oxidize slowly on prolonged air exposure; 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.) | 1974 |
| Halogen Content | Cl-containing |
Related Dichloro Standards
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- 2,5-Dichloro-m-terphenyl (CAS 215508-04-6)
- 2,5-Dichloro-o-terphenyl (CAS 61577-02-4)
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- 6,7-Dichloro-2-cyclopentyl-5-methoxy-2,3-dihydro-1H-inden-1-one (CAS 54197-02-3)
- 4,6-Dichloro-5-(4-fluorophenyl)-2-isobutylpyrimidine (CAS 1511078-05-9)
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Recommended Standards
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