Bis(trimethylsilyl)acetylene

Also known as: 1,2-Bis(trimethylsilyl)acetylene, 1,2-Bis(trimethylsilyl)ethyne, BTMSA, BSTMA, 2,5-Disilahex-3-yne, 2,2,5,5-tetramethyl-, Silane, 1,2-ethynediylbis[trimethyl-, ethyne-1,2-diylbis(trimethylsilane), trimethyl(2-trimethylsilylethynyl)silane

Bis(trimethylsilyl)acetylene (CAS 14630-40-1) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C8H18Si2 and a molecular weight of 170.400 g/mol. Key properties include a melting point of 21-24 °C(lit.), a boiling point of 134.6±8.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of 17.1±11.5 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 14630-40-1
Jingsj CID: J-47838-6
Molecular Formula: C₈H₁₈Si₂
Molecular Weight: 170.400 g/mol
Category: Aliphatic Hydrocarbons
Last updated: 8/21/2026

Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Melting Point	21-24 °C(lit.)
Boiling Point	134.6±8.0 °C at 760 mmHg
Density	0.8±0.1 g/cm3
Flash Point	17.1±11.5 °C
Exact Mass	170.094696
LogP	4.03
Vapor Pressure	9.9±0.2 mmHg at 25°C
Refractive Index	1.420
Additional Property	MAY DECOMPOSE

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 Bis(trimethylsilyl)acetylene?

The CAS number of Bis(trimethylsilyl)acetylene is 14630-40-1.

What are the molecular formula and molecular weight of Bis(trimethylsilyl)acetylene?

Bis(trimethylsilyl)acetylene has molecular formula C8H18Si2 and molecular weight 170.400 g/mol.

What are the upstream and downstream products of Bis(trimethylsilyl)acetylene?

For Bis(trimethylsilyl)acetylene, Upstream Products: Chlorotrimethylsilane, Trimethylsilylacetylene, Vinyl bromide; Downstream Products: 4-(Trimethylsilyl)-3-butyn-2-one, 1-Trimethylsilyl-1-hexyne, Acetylene.

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. "Bis(trimethylsilyl)acetylene (CAS 14630-40-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-47838-6 (accessed 2026-11-09).

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