1,3,5-Tris((trimethylsilyl)ethynyl)benzene CAS 18772-58-2
| CAS No. | 18772-58-2 |
| Molecular Formula | C21H30Si3 |
| Molecular Weight | 366.72 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.
1,3,5-Tris((trimethylsilyl)ethynyl)benzene (CAS 18772-58-2) is a high-purity analytical reference standard with the molecular formula C21H30Si3 and a molecular weight of 366.72 g/mol.
Owing to a polycyclic aromatic system, 1,3,5-Tris((trimethylsilyl)ethynyl)benzene is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 366.72 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).
CATO manufactures 1,3,5-Tris((trimethylsilyl)ethynyl)benzene under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C21H30Si3 |
| Molecular Weight | 366.72 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
Related Tris Standards
- Bis[2-(trimethylsilyl)ethyl] N,N-diisopropylphosphoramidite (CAS 121373-20-4)
- 17-O-Trimethylsilyl 6,7-Dehydro Norethindrone (CAS 300542-58-9)
- 9-(Trimethylsilyl)-2,6-bis[(trimethylsilyl)oxy]-9h-purine (CAS 18551-03-6)
- 2,4,6-Tris((trimethylsilyl)ethynyl)-1,3,5-triazine (CAS 155202-89-4)
- 17-O-Trimethylsilyl Norethindrone (CAS 28426-43-9)
- 9,10-Bis((trimethylsilyl)ethynyl)anthracene (CAS 18750-95-3)
- 2,4-Bis[(trimethylsilyl)oxy]benzoic Acid Trimethylsilyl EsterDISCONTINUED (CAS 10586-16-0)
- Trimethylsilyl nonafluorobutanesulfonate (CAS 68734-62-3)
Recommended Standards
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- 8-Acetyl-3-(3-chloro-5-(trifluoromethyl)pyridin-2-yl)quinolin-4(1H)-one (CAS 551930-82-6)
- 3-Cyano-n-((tetrahydrofuran-3-yl)methyl)benzenesulfonamide (CAS 1223171-10-5)
- 1-(2-Anthryl)propylamine (CAS 1270523-64-2)
- 5-Iodopyrimidin-2(1H)-one (CAS 79387-69-2)
- 2-chloro-N-(3-acetamidophenyl)propanamide (CAS 1016776-71-8)
- tert-Butyl 8-amino-3-azaspiro[5.5]undecane-3-carboxylate (CAS 1782214-37-2)
- Methyl 4-(chlorosulfonyl)-1,2,5-trimethyl-1h-pyrrole-3-carboxylate (CAS 306936-33-4)
- 1-(3-Fluorophenyl)-2-propyn-1-ol (CAS 2107-40-6)
- 2-[2-(trifluoromethoxy)benzylidene]malononitrile (CAS 255820-39-4)
- N-(3-Oxobutan-2-yl)acetamide (CAS 6628-81-5)
- Insulin Degludec Impurity 6 (CAS CATO-C4X-21576)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
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