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Lithium pentamethylcyclopentadienide

Also known as: 1,2,3,4,5-Pentamethyl-2,4-cyclopentadien-1-yllithium, 1,2,3,4,5-Pentamethylcyclopentadienyllithium, Lithium 1,2,3,4,5-pentamethylcyclopentadienide, Lithium pentamethylcyclopentadiene, Pentamethylcyclopentadienyllithium, 1,2,3,4,5-Pentamethyl-5-lithio-1,3-cyclopentadiene, 1,3-Cyclopentadiene,1,2,3,4,5-pentamethyl-,lithium complex

Lithium pentamethylcyclopentadienide (CAS 51905-34-1) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C10H15Li and a molecular weight of 142.16700 g/mol. Key property: a melting point of 230ºC. It is classified under GHS with signal word Danger and hazard statements H250, H261 and H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
51905-34-1
Jingsj CID
J-14303-3
Molecular Formula
C10H15Li
Molecular Weight
142.16700 g/mol
Category
Aliphatic Hydrocarbons
Last updated
8/21/2026
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Physicochemical Properties

Melting Point230ºC
Exact Mass142.13300
LogP2.97200

GHS Safety & Compliance

Flammable / Corrosion / Health HazardSignal word: Danger
  • H250
  • H261
  • H314 — Causes severe skin burns and eye damage
  • H361 — Suspected of damaging fertility or the unborn child

Frequently Asked Questions

What is the CAS number of Lithium pentamethylcyclopentadienide?

The CAS number of Lithium pentamethylcyclopentadienide is 51905-34-1.

What are the molecular formula and molecular weight of Lithium pentamethylcyclopentadienide?

Lithium pentamethylcyclopentadienide has molecular formula C10H15Li and molecular weight 142.16700 g/mol.

Is Lithium pentamethylcyclopentadienide hazardous?

Lithium pentamethylcyclopentadienide has GHS signal word Danger and hazard statements H250; H261; H314 — Causes severe skin burns and eye damage.

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

Last updated:

How to cite: Jingsj. "Lithium pentamethylcyclopentadienide (CAS 51905-34-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-14303-3 (accessed 2026-11-09).

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