(Pentamethylcyclopentadien-1-yl)trimethylsilane

5-(三甲基硅基)-1,2,3,4,5-五甲基-1,3-环戊二烯

Also known as: 5-(trimethylsilyl)-1,2,3,4,5-pentamethyl-1,3-cyclopentadiene, 1,3-Cyclopentadiene, 1,2,3,4,5-pentamethyl-5-(trimethylsilyl)-, MFCD00151193, Trimethyl(1,2,3,4,5-pentamethyl-2,4-cyclopentadien-1-yl)silane, Trimethyl(1,2,3,4,5-pentamethylcyclopenta-2,4-dien-1-yl)silane, trimethyl-(1,2,3,4,5-pentamethylcyclopenta-2,4-dien-1-yl)silane

(Pentamethylcyclopentadien-1-yl)trimethylsilane (CAS 87778-95-8) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C13H24Si and a molecular weight of 208.415 g/mol. It is also known as 5-(trimethylsilyl)-1,2,3,4,5-pentamethyl-1,3-cyclopentadiene, 1,3-Cyclopentadiene, 1,2,3,4,5-pentamethyl-5-(trimethylsilyl)- and MFCD00151193. Key properties include a boiling point of 232.3±9.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of 79.8±12.3 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 87778-95-8
Jingsj CID: J-4718-0
Molecular Formula: C₁₃H₂₄Si
Chinese Name: 5-(三甲基硅基)-1,2,3,4,5-五甲基-1,3-环戊二烯
Molecular Weight: 208.415 g/mol
Category: Aliphatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	232.3±9.0 °C at 760 mmHg
Density	0.8±0.1 g/cm3
Flash Point	79.8±12.3 °C
Exact Mass	208.164734
LogP	6.20
Vapor Pressure	0.1±0.4 mmHg at 25°C
Refractive Index	1.462

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 (Pentamethylcyclopentadien-1-yl)trimethylsilane?

The CAS number of (Pentamethylcyclopentadien-1-yl)trimethylsilane is 87778-95-8.

What are the molecular formula and molecular weight of (Pentamethylcyclopentadien-1-yl)trimethylsilane?

(Pentamethylcyclopentadien-1-yl)trimethylsilane has molecular formula C13H24Si and molecular weight 208.415 g/mol.

What are the upstream and downstream products of (Pentamethylcyclopentadien-1-yl)trimethylsilane?

For (Pentamethylcyclopentadien-1-yl)trimethylsilane, Upstream Products: Chlorotrimethylsilane, Lithium pentamethylcyclopentadienide; Downstream Products: Pentamethylcyclopentadienyltitanium trichloride.

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

Last updated: 8/21/2026

How to cite: Jingsj. "(Pentamethylcyclopentadien-1-yl)trimethylsilane (CAS 87778-95-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-4718-0 (accessed 2026-10-28).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.