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Bis(cyclopentadienyl)chromium(II)

Also known as: Chromocene, Bis(cyclopentadienyl)chromium, Bis(η5-cyclopentadienyl)chromium, Di(cyclopentadienyl)chromium(II), Bis(cyclopentadiene)chromium, Chromocene (Di(cyclopentadienyl)chromium(II))

Bis(cyclopentadienyl)chromium(II) (CAS 1271-24-5) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C10H10Cr and a molecular weight of 182.18200 g/mol. Key properties include a melting point of 172-173ºC and a boiling point of 41.5ºC at 760 mmHg. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H312 — Harmful in contact with skin and H315 — Causes skin irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
1271-24-5
Jingsj CID
J-11330-8
Molecular Formula
C10H10Cr
Molecular Weight
182.18200 g/mol
Category
Aliphatic Hydrocarbons
Last updated
8/21/2026
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Physicochemical Properties

Melting Point172-173ºC
Boiling Point41.5ºC at 760 mmHg
Exact Mass182.01900
LogP2.04300
Vapor Pressure418mmHg at 25°C
Additional PropertyInsoluble in water.

GHS Safety & Compliance

IrritantSignal word: Warning
  • H302 — Harmful if swallowed
  • H312 — Harmful in contact with skin
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H332 — Harmful if inhaled
  • H335 — May cause respiratory irritation

Frequently Asked Questions

What is the CAS number of Bis(cyclopentadienyl)chromium(II)?

The CAS number of Bis(cyclopentadienyl)chromium(II) is 1271-24-5.

What are the molecular formula and molecular weight of Bis(cyclopentadienyl)chromium(II)?

Bis(cyclopentadienyl)chromium(II) has molecular formula C10H10Cr and molecular weight 182.18200 g/mol.

Is Bis(cyclopentadienyl)chromium(II) hazardous?

Bis(cyclopentadienyl)chromium(II) has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H312 — Harmful in contact with skin; H315 — Causes skin irritation.

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

Last updated:

How to cite: Jingsj. "Bis(cyclopentadienyl)chromium(II) (CAS 1271-24-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-11330-8 (accessed 2026-11-07).

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