tetrakis(trimethylsilyl)silane

Also known as: tetrakis(trimethylsilyl)silane, TMSS, 1,1,1,3,3,3-hexamethyl-2,2-bis(trimethylsilyl)trisilane, 2,2-bis(trimethylsilyl)-1,1,1,3,3,3-hexamethyl-trisilane, Si(Si(CH3)3)4, tetra(trimethylsilyl)-silane, tetrakil(trimethylsilyl)silane, MFCD00054859, Trisilane, 1,1,1,3,3,3-hexamethyl-2,2-bis(trimethylsilyl)-

tetrakis(trimethylsilyl)silane (CAS 4098-98-0) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C12H36Si5 and a molecular weight of 320.842 g/mol. Key properties include a melting point of ≥300 °C(lit.), a boiling point of 265.2±23.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of 84.4±15.6 °C. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.

CAS No.: 4098-98-0
Jingsj CID: J-4266-0
Molecular Formula: C₁₂H₃₆Si₅
Molecular Weight: 320.842 g/mol
Category: Aliphatic Hydrocarbons
Last updated: 11/3/2026

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Physicochemical Properties

Melting Point	≥300 °C(lit.)
Boiling Point	265.2±23.0 °C at 760 mmHg
Density	0.8±0.1 g/cm3
Flash Point	84.4±15.6 °C
Exact Mass	320.166321
LogP	6.50
Vapor Pressure	0.0±0.5 mmHg at 25°C
Refractive Index	1.414

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 tetrakis(trimethylsilyl)silane?

The CAS number of tetrakis(trimethylsilyl)silane is 4098-98-0.

What are the molecular formula and molecular weight of tetrakis(trimethylsilyl)silane?

tetrakis(trimethylsilyl)silane has molecular formula C12H36Si5 and molecular weight 320.842 g/mol.

What are the upstream and downstream products of tetrakis(trimethylsilyl)silane?

For tetrakis(trimethylsilyl)silane, Upstream Products: Chlorotrimethylsilane, Tetrachlorosilane, Dichlorodiphenylsilane; Downstream Products: tetrakis(dimethylsilyl)silane, Tris(trimethylsilyl)silane, Chlorotris(trimethylsilyl)silane.

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

Last updated: 11/3/2026

How to cite: Jingsj. "tetrakis(trimethylsilyl)silane (CAS 4098-98-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-4266-0 (accessed 2026-11-09).

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