21854-95-5 Benzil, 2,2'-dichloro- (8CI) 1,2-Ethanedione, 1,2-bis(2-chlorophenyl)- Ethanedione, bis(2-chlorophenyl)- 2,2'-Dichlorobenzil NSC 114829 CAS 21854-95-5
| CAS No. | 21854-95-5 |
| Molecular Formula | C14H20Cl2O2 |
| Molecular Weight | 291.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 21854-95-5 Benzil, 2,2'-dichloro- (8CI) 1,2-Ethanedione, 1,2-bis(2-chlorophenyl)- Ethanedione, bis(2-chlorophenyl)- 2,2'-Dichlorobenzil NSC 114829 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
21854-95-5 Benzil, 2,2'-dichloro- (8CI) 1,2-Ethanedione, 1,2-bis(2-chlorophenyl)- Ethanedione, bis(2-chlorophenyl)- 2,2'-Dichlorobenzil NSC 114829 (CAS 21854-95-5), molecular formula C14H20Cl2O2 and molecular weight 291.21 g/mol, is a CATO reference standard with documented purity and traceability.
21854-95-5 Benzil, 2,2'-dichloro- (8CI) 1,2-Ethanedione, 1,2-bis(2-chlorophenyl)- Ethanedione, bis(2-chlorophenyl)- 2,2'-Dichlorobenzil NSC 114829 (C14H20Cl2O2) 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. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C14H20Cl2O2 |
| Molecular Weight | 291.21 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Halogen Content | Cl-containing |
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