Pcb No. 157 CAS 69782-90-7
| CAS No. | 69782-90-7 |
| Molecular Formula | C12H4Cl6 |
| Molecular Weight | 360.88 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 360.88 g/mol gives Pcb No. 157 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Pcb No. 157 (CAS 69782-90-7), molecular formula C12H4Cl6 and molecular weight 360.88 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C12H4Cl6, Pcb No. 157 contains chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 360.88 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
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 | C12H4Cl6 |
| Molecular Weight | 360.88 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| 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.) | 1976 |
| Halogen Content | Cl-containing |
Recommended Standards
- Pcb No. 156 (CAS 38380-08-4)
- Pcb No. 158 (CAS 74472-42-7)
- Pcb No. 155 (CAS 33979-03-2)
- Pcb No. 159 (CAS 39635-35-3)
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