(4-Chlorophenylethynyl)trimethylsilane
Also known as: [(4-Chlorophenyl)ethynyl](trimethyl)silane, 1-(4-Chlorophenyl)-2-(trimethylsilyl)acetylene, 1-(Trimethylsilyl)-2-(4-chlorophenyl)ethyne, 1-Chloro-4-[(trimethylsilyl)ethynyl]benzene, 4-Chlorophenyl(trimethylsilyl)ethyne, Trimethylsilyl(4-chlorophenyl)acetylene, (2-(4-chlorophenyl)ethynyl)trimethylsilane, Benzene, 1-chloro-4-[2-(trimethylsilyl)ethynyl]-, Trimethylsilyl-4-chlorophenylacetylene, 2-(4-chlorophenyl)ethynyl-trimethylsilane, chloro-4-trimethylsilylethynylbenzene
(4-Chlorophenylethynyl)trimethylsilane (CAS 78704-49-1) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C11H13ClSi and a molecular weight of 208.759 g/mol. Key properties include a melting point of 47-51ºC(lit.), a boiling point of 231.2±32.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 95.4±19.9 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 78704-49-1
- Jingsj CID
- J-37241-8
- Molecular Formula
- C11H13ClSi
- Molecular Weight
- 208.759 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 47-51ºC(lit.) |
|---|---|
| Boiling Point | 231.2±32.0 °C at 760 mmHg |
| Density | 1.0±0.1 g/cm3 |
| Flash Point | 95.4±19.9 °C |
| Exact Mass | 208.047501 |
| LogP | 5.05 |
| Appearance | Solid | White to pale brown |
| Vapor Pressure | 0.1±0.4 mmHg at 25°C |
| Refractive Index | 1.520 |
Customs & Trade Information
| HS Code | 2931900090 |
|---|---|
| Summary | 2931900090. other organo-inorganic compounds. VAT:17.0%. Tax rebate rate:13.0%. Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward). MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of (4-Chlorophenylethynyl)trimethylsilane?
The CAS number of (4-Chlorophenylethynyl)trimethylsilane is 78704-49-1.
What are the molecular formula and molecular weight of (4-Chlorophenylethynyl)trimethylsilane?
(4-Chlorophenylethynyl)trimethylsilane has molecular formula C11H13ClSi and molecular weight 208.759 g/mol.
What are the upstream and downstream products of (4-Chlorophenylethynyl)trimethylsilane?
For (4-Chlorophenylethynyl)trimethylsilane, Upstream Products: 4-Bromochlorobenzene, Trimethylsilylacetylene, 1-Chloro-4-iodobenzene; Downstream Products: 2,4'-Dichloroacetophenone, Ethyl 3-(4-chlorophenyl)-2-propynoate, 1-Chloro-4-ethynylbenzene.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "(4-Chlorophenylethynyl)trimethylsilane (CAS 78704-49-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-37241-8 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.