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3-(Trimethylsilyl)propynoic acid

Also known as: 3-(Trimethylsilyl)propiolic acid, 3-(Trimethylsilyl)propynoic acid, 3-(Trimethylsilyl)-2-propynoic acid, 3-trimethylsilylprop-2-ynoic acid, 3-(TRIMETHYLSILYL)PROP-2-YNOIC ACID, MFCD00190216, TIMTEC-BB SBB009048

3-(Trimethylsilyl)propynoic acid (CAS 5683-31-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H10O2Si and a molecular weight of 142.228 g/mol. Key properties include a melting point of 47-49 °C(lit.), a boiling point of 219.1±9.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 86.3±18.7 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
5683-31-8
Jingsj CID
J-31100-2
Molecular Formula
C6H10O2Si
Molecular Weight
142.228 g/mol
Category
Organic Acids
Last updated
8/21/2026
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Physicochemical Properties

Melting Point47-49 °C(lit.)
Boiling Point219.1±9.0 °C at 760 mmHg
Density1.0±0.1 g/cm3
Flash Point86.3±18.7 °C
Exact Mass142.045013
PSA37.30000
LogP2.19
Vapor Pressure0.0±0.9 mmHg at 25°C
Refractive Index1.452

GHS Safety & Compliance

IrritantSignal word: Warning
  • 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)propynoic acid?

The CAS number of 3-(Trimethylsilyl)propynoic acid is 5683-31-8.

What are the molecular formula and molecular weight of 3-(Trimethylsilyl)propynoic acid?

3-(Trimethylsilyl)propynoic acid has molecular formula C6H10O2Si and molecular weight 142.228 g/mol.

Is 3-(Trimethylsilyl)propynoic acid hazardous?

3-(Trimethylsilyl)propynoic acid has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.

What are the upstream and downstream products of 3-(Trimethylsilyl)propynoic acid?

For 3-(Trimethylsilyl)propynoic acid, Upstream Products: 3-(Trimethylsilyl)-2-propyn-1-ol, Carbon dioxide, Trimethylsilylacetylene; Downstream Products: Methyl 3-(trimethylsilyl)propiolate, 3-(Trimethylsilyl)propionic acid, Cyclohexene, 4-methyl-.

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)propynoic acid (CAS 5683-31-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-31100-2 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.