4-(Trimethylsilyl)-3-butyn-2-one

Also known as: 4-Trimethylsilyl-3-butyn-2-one, 4-TMS-3-butyn-2-one, 3-Butyn-2-one, 4-(trimethylsilyl)-, (Acetylethynyl)trimethylsilane, 1-(Trimethylsilyl)-1-butyn-3-one, Methyltrimethylsilylethynyl ketone, MFCD00190212

4-(Trimethylsilyl)-3-butyn-2-one (CAS 5930-98-3) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C7H12OSi and a molecular weight of 140.255 g/mol. Key properties include a boiling point of 144.6±9.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 41.2±18.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 5930-98-3
Jingsj CID: J-47307-4
Molecular Formula: C₇H₁₂OSi
Molecular Weight: 140.255 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	144.6±9.0 °C at 760 mmHg
Density	0.9±0.1 g/cm3
Flash Point	41.2±18.7 °C
Exact Mass	140.065735
PSA	17.07000
LogP	2.32
Vapor Pressure	5.1±0.3 mmHg at 25°C
Refractive Index	1.428

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-(Trimethylsilyl)-3-butyn-2-one?

The CAS number of 4-(Trimethylsilyl)-3-butyn-2-one is 5930-98-3.

What are the molecular formula and molecular weight of 4-(Trimethylsilyl)-3-butyn-2-one?

4-(Trimethylsilyl)-3-butyn-2-one has molecular formula C7H12OSi and molecular weight 140.255 g/mol.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "4-(Trimethylsilyl)-3-butyn-2-one (CAS 5930-98-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-47307-4 (accessed 2026-11-09).

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