1,2,3,4,7-Pentachlorodibenzo-p-dioxin CAS 39227-61-7
| CAS No. | 39227-61-7 |
| Molecular Formula | C12H3Cl5O2 |
| Molecular Weight | 356.42 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
1,2,3,4,7-Pentachlorodibenzo-p-dioxin (CAS 39227-61-7) is a high-purity analytical reference standard with the molecular formula C12H3Cl5O2 and a molecular weight of 356.42 g/mol.
1,2,3,4,7-Pentachlorodibenzo-p-dioxin (C12H3Cl5O2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C12H3Cl5O2 |
| Molecular Weight | 356.42 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 |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
| Halogen Content | Cl-containing |
Related Pentachlorodibenzo Standards
- 1,2,3,7,8-Pentachlorodibenzo-p-dioxin (CAS 40321-76-4)
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