3-(Trimethylsilyl)propiolaldehyde
Also known as: 3-(Trimethylsilyl)-2-propynal, 3-(Trimethylsilyl)propynal, 3-(Trimethylsilyl)propargyl aldehyde, 3-Trimethylsilylprop-2-ynal, 3-trimethylsilylprop-2-ynal, Trimethylsilylpropynal, trimethylsilyl propargyl aldehyde, trimethylsilylprop-2-yn-1-al
3-(Trimethylsilyl)propiolaldehyde (CAS 2975-46-4) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C6H10OSi and a molecular weight of 126.229 g/mol. Key properties include a boiling point of 128.8±9.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 31.7±18.7 °C. It is classified under GHS with signal word Warning and hazard statements H226 — Flammable liquid and vapour, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 2975-46-4
- Jingsj CID
- J-1515116-3
- Molecular Formula
- C6H10OSi
- Molecular Weight
- 126.229 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
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Request a quotePhysicochemical Properties
| Boiling Point | 128.8±9.0 °C at 760 mmHg |
|---|---|
| Density | 0.9±0.1 g/cm3 |
| Flash Point | 31.7±18.7 °C |
| Exact Mass | 126.050095 |
| PSA | 17.07000 |
| LogP | 2.45 |
| Appearance | Liquid | Colorless to yellow |
| Vapor Pressure | 12.7±0.2 mmHg at 25°C |
| Refractive Index | 1.424 |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Frequently Asked Questions
What is the CAS number of 3-(Trimethylsilyl)propiolaldehyde?
The CAS number of 3-(Trimethylsilyl)propiolaldehyde is 2975-46-4.
What are the molecular formula and molecular weight of 3-(Trimethylsilyl)propiolaldehyde?
3-(Trimethylsilyl)propiolaldehyde has molecular formula C6H10OSi and molecular weight 126.229 g/mol.
Is 3-(Trimethylsilyl)propiolaldehyde hazardous?
3-(Trimethylsilyl)propiolaldehyde has GHS signal word Warning and hazard statements H226 — Flammable liquid and vapour; H315 — Causes skin irritation; H319 — Causes serious eye irritation.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3-(Trimethylsilyl)propiolaldehyde (CAS 2975-46-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1515116-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.