4,4’-Dichlorobenzoin CAS 4254-20-0
| CAS No. | 4254-20-0 |
| Molecular Formula | C14H10Cl2O2 |
| Molecular Weight | 281.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 4,4’-Dichlorobenzoin (CAS 4254-20-0), a certified reference material (molecular formula C14H10Cl2O2, MW 281.13 g/mol) for analytical method development and quality control.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, a polycyclic aromatic system, 4,4’-Dichlorobenzoin is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 281.13 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C14H10Cl2O2 |
| Molecular Weight | 281.13 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, 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.) | 1958 |
| Halogen Content | Cl-containing |
Related Dichlorobenzoin Standards
Recommended Standards
- 4-(Benzyloxy)-3,5-dichlorobenzaldehyde (CAS 289662-11-9)
- 4-[(2,4-Dichlorobenzyl)oxy]benzaldehyde (CAS 70627-17-7)
- 4-(Benzyloxy)-2,6-dichlorobenzaldehyde (CAS 461031-79-8)
- 4-[(3,4-Dichlorobenzyl)oxy]benzaldehyde (CAS 66742-56-1)
- 1,1-Bis(benzo[d]thiazol-2-yl)ethanol (CAS 126521-84-4)
- Substance P (9-11) (CAS 40297-96-9)
- 1-Methoxy-4-(2-nitroprop-1-en-1-yl)benzene (CAS 37629-51-9)
- 2,6-Bis(benzyloxy)pyridine (CAS 16727-46-1)
- 4-Chloro-5-iodo-2-(methylthio)pyrimidine (CAS 111079-19-7)
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- Neuropeptide W-23 (rat) (CAS 383415-89-2)
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