2,5-Dibromo-1,1,3,4-tetraphenyl-1H-silole CAS 200068-36-6
| CAS No. | 200068-36-6 |
| Molecular Formula | C28H20Br2Si |
| Molecular Weight | 544.35 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2,5-Dibromo-1,1,3,4-tetraphenyl-1H-silole (CAS 200068-36-6), molecular formula C28H20Br2Si and molecular weight 544.35 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to bromine substitution, a polycyclic aromatic system, 2,5-Dibromo-1,1,3,4-tetraphenyl-1H-silole is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 544.35 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
As a certified reference material (CRM), 2,5-Dibromo-1,1,3,4-tetraphenyl-1H-silole 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.
Physical & Chemical Properties
| Molecular Formula | C28H20Br2Si |
| Molecular Weight | 544.35 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature, 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) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2014 |
| Halogen Content | Br-containing |
Related Dibromo Standards
- 3-(3,5-Dibromo-4-hydroxyphenyl)-N-(4-phenoxybenzyl)-1,2,4-oxadiazole-5-carboxamide (CAS 1191252-49-9)
- 3-(3,5-Dibromo-4-methoxybenzoyl)-2-ethyl-N,N-dimethylbenzofuran-6-sulfonamide (CAS 1951451-68-5)
- N-(2,6-Dibromo-4-methylphenyl)-2-((3-ethyl-5,6-dimethyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidin-2-yl)thio)acetamide (CAS 573706-62-4)
- 2,2''-Dibromo-5'-(2-bromophenyl)-1,1':3',1''-terphenyl (CAS 380626-56-2)
- (1R)-3,3'-Dibromo-5,5',6,6',7,7',8,8'-octahydro-2,2'-bis(methoxymethoxy)-1,1'-binaphthalene (CAS 791616-64-3)
- 1,26-Dibromo-3,6,9,12,15,18,21,24-octaoxahexacosane (CAS 2376383-09-2)
- 1,4-Dibromo-2,5-bis(decyloxy)benzene (CAS 152269-98-2)
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Recommended Standards
- 5-Fluoro-6-iodo-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1-(triisopropylsilyl)-1H-pyrrolo[2,3-b]pyridine (CAS 1357387-67-7)
- 5,5'-(1,3,5,7-Tetraoxopyrrolo[3,4-f]isoindole-2,6(1H,3H,5H,7H)-diyl)diisophthalic acid (CAS 304689-02-9)
- Stampidine, >98% (HPLC) (CAS 217178-62-6)
- N-(4-(3-chloro-5-(trifluoromethyl)pyridin-2-yl)piperazine-1-carbonothioyl)-3-(2-chlorophenyl)-5-methylisoxazole-4-carboxamide (CAS 303150-16-5)
- 5-(Thiophen-2-yl)pyridin-2-amine (CAS 866620-28-2)
- 6-Oxo-5-azaspiro[2.4]heptane-4,4-dicarboxylic acid (CAS 2856019-51-5)
- 1-Pentyl-1h-1,2,4-triazol-3-amine (CAS 1182952-47-1)
- 4-{4-[(5-bromothiophen-2-yl)sulfonyl]piperazin-1-yl}-4-oxobutanoic acid (CAS 888111-57-7)
- (2R,3S)-3-azido-1-tert-butoxycarbonyl-pyrrolidine-2-carboxylic acid (CAS 1095199-32-8)
- 2-Benzoyl-1h-indene-1,3(2h)-dione (CAS 1785-95-1)
- 2-Ethyl-3,3-dimethylpentanoic acid (CAS 214692-25-8)
- 3-(Difluoromethyl)-4-ethoxyaniline (CAS 1344218-01-4)
- 1-Bromo-3-(cyclohexyloxy)benzene (CAS 37631-06-4)
- Semaglutide Impurity 145 (CAS CATO-C4X-2226145)
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