1-(Trimethylsilyl)-3,4-dichlorobenzene CAS 149021-03-4
| CAS No. | 149021-03-4 |
| Molecular Formula | C9H12Cl2Si |
| Molecular Weight | 219.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
1-(Trimethylsilyl)-3,4-dichlorobenzene (CAS 149021-03-4), molecular formula C9H12Cl2Si and molecular weight 219.18 g/mol, is a CATO reference standard with documented purity and traceability.
1-(Trimethylsilyl)-3,4-dichlorobenzene (C9H12Cl2Si) contains chlorine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
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 | C9H12Cl2Si |
| Molecular Weight | 219.18 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1999 |
| Halogen Content | Cl-containing |
Related Trimethylsilyl Standards
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- 2-(Trimethylsilyl)furo[3,2-b]pyridine-6-carbaldehyde (CAS 1171920-34-5)
- Methyl 2-((trimethylsilyl)oxy)isoxazolidine-5-carboxylate (CAS 55134-75-3)
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- 1,6-Bis(trimethylsilyl)hexa-1,3,5-triyne (CAS 21752-86-3)
- 1-Phenyl-4-(trimethylsilyl)but-3-yn-2-ol (CAS 61077-69-8)
- 1-(Trimethylsilyl)-4-fluoronaphthalene (CAS 35869-77-3)
Recommended Standards
- Pyrrolidin-3-yl trifluoromethanesulfonate (CAS 1337882-60-6)
- 6-(Trifluoromethyl)benzo[d]oxazole-2(3H)-thione (CAS 149367-81-7)
- (R)-Pyrrolidin-3-yl trifluoromethanesulfonate (CAS 1337880-50-8)
- (1-Trifluoromethanesulfonylazetidin-3-yl)methanol (CAS 1497101-94-6)
- N-(2,3,4-Trimethoxybenzyl)cyclopentanamine hydrobromide (CAS 1609408-86-7)
- Methyl 7-oxo-6,7-dihydro-5H-cyclopenta[b]pyridine-2-carboxylate (CAS 2091561-37-2)
- (2E)-2-Cyano-3-(2-methoxyphenyl)-N-(pyridin-2-yl)prop-2-enamide (CAS 1327175-35-8)
- 1-(2,5-Dimethylphenyl)-4-(1-phenyl-1H-1,2,3,4-tetrazol-5-yl)piperazine (CAS 339105-56-5)
- 7-(2-Chloro-6-fluorophenyl)-5-methyl-6,7-dihydro-1H-1,4-diazepine-2,3-dicarbonitrile (CAS 861209-94-1)
- 4-(3-Aminophenyl)-N-methyl-1,3-thiazol-2-amine (CAS 89250-32-8)
- 4-Bromo-N-((4-methyl-5-(prop-2-yn-1-ylthio)-4H-1,2,4-triazol-3-yl)methyl)benzenesulfonamide (CAS 338421-59-3)
- 5-Fluoro AKB48 N-(4-Hydroxypentyl) Metabolite (CAS 1843184-42-8)
- Methyl 2,6-bis(tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indole-4-carboxylate (CAS 2377607-22-0)
- Semaglutide impurity 266 (CAS CATO-C4X-2226266)
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