Lithium (trimethylsilyl)acetylide
Also known as: (Trimethylsilyl)ethynyllithium, Lithium trimethylsilylacetylide, Ethynyl(trimethyl)silane lithium
Lithium (trimethylsilyl)acetylide (CAS 54655-07-1) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C5H9LiSi and a molecular weight of 104.15100 g/mol. Key properties include a boiling point of 53ºC at 760 mmHg, a density of 0.829 g/mL at 25ºC and a flash point of -23.3 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H302 — Harmful if swallowed and H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.
- CAS No.
- 54655-07-1
- Jingsj CID
- J-1408361-5
- Molecular Formula
- C5H9LiSi
- Molecular Weight
- 104.15100 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 11/2/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 53ºC at 760 mmHg |
|---|---|
| Density | 0.829 g/mL at 25ºC |
| Flash Point | -23.3 °C |
| Exact Mass | 104.06300 |
| LogP | 1.37400 |
| Appearance | Solution | Clear yellow to orange |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
- H302 — Harmful if swallowed
- H314 — Causes severe skin burns and eye damage
- H335 — May cause respiratory irritation
- H351 — Suspected of causing cancer
Frequently Asked Questions
What is the CAS number of Lithium (trimethylsilyl)acetylide?
The CAS number of Lithium (trimethylsilyl)acetylide is 54655-07-1.
What are the molecular formula and molecular weight of Lithium (trimethylsilyl)acetylide?
Lithium (trimethylsilyl)acetylide has molecular formula C5H9LiSi and molecular weight 104.15100 g/mol.
Is Lithium (trimethylsilyl)acetylide hazardous?
Lithium (trimethylsilyl)acetylide has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H302 — Harmful if swallowed; H314 — Causes severe skin burns and eye damage.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Lithium (trimethylsilyl)acetylide (CAS 54655-07-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1408361-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.