CompoundList
Sign in
Organometallic compounds

Chromocene

Also known as Bis(cyclopentadienyl)chromium, Bis(cyclopentadiene)chromium(II), Di((eta-5)-cyclopentadienyl)chromium

CAS 1271-24-5Formula C10H10CrMolar mass 182.19 g/molEC 215-036-4
GHS signal word: Danger. Pictograms: Corrosive, Harmful or irritant 5 suppliers listed
Get quotes Compare 5 suppliers
Chromocene chemical structure, C10H10Cr, CAS 1271-24-5
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Crystals
Melting point
172.8 °C
Boiling point
75 to 90
Solubility
Decomposes
HS code
290290
Category
Organometallic compounds
UN number
UN 1325
Illustrative photo, a shrink wrapped pallet of kraft paper sacks in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Chromocene?

Plain description, key identifiers and synonyms

Bis(cyclopentadienyl)chromium appears as red needles or reddish-purple solid. (NTP, 1992)

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
chromium(2+), bis(cyclopenta-1,3-diene)
CAS number
1271-24-5 CAS number cross-checked
EC number
215-036-4
Molecular formula
C10H10Cr
UNII
FI251W8B1L
InChIKey
TYYBBNOTQFVVKN-UHFFFAOYSA-N
InChI
InChI=1S/2C5H5.Cr/c2*1-2-4-5-3-1;/h2*1-5H;/q2*-1;+2
SMILES (canonical and isomeric)
[CH-]1C=CC=C1.[CH-]1C=CC=C1.[Cr+2]

Synonyms

  • Bis(cyclopentadienyl)chromium
  • Bis(cyclopentadiene)chromium(II)
  • Di((eta-5)-cyclopentadienyl)chromium
  • Bis(eta5-cyclopenta-2,4-dien-1-yl)chromium
  • Bis(eta(5)-2,4-cyclopentadien-1-yl) chromium
  • Chromium, bis(eta(5)-2,4-cyclopentadien-1-yl)
  • bis(eta-Cyclopentadienyl) chromium
  • bis(eta5-Cyclopentadienyl) chromium
  • di-pi-Cyclopentadienylchromium
  • Bis(cyclopentadiene)chromium ii
  • Bis(cyclopentadienyl)chromium ii
  • Chromium, di-pi-cyclopentadienyl-
  • Di(eta5-cyclopentadienyl)chromium
  • Bis(eta5-cyclopentadienyl)chromium
  • Chromium, bis(eta5-2,4-cyclopentadien-1-yl)-
  • lambda2-chromium(2+) ion bis(cyclopenta-2,4-dien-1-ide)
  • bis(eta(5)-cyclopentadienyl)chromium, bis(eta(5)-cyclopentadienyl)chromium(II)
  • (Cr(eta(5)-C5H5)2)
  • [Cr(eta(5)-C5H5)2]
  • bis(eta(5)-cyclopentadienyl)chromium
  • bis(eta(5)-cyclopentadienyl)chromium(II)
  • Bis(cyclopentadienyl)chromium(II)
  • Bis(cyclopentadiene)chromium
  • Chromium, dicyclopentadienyl-
  • C10H10Cr
Show all 26 synonyms
  • chromous, cyclopenta-1,3-diene

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Physical form
Crystalsexp.
Melting point
172.8 °Cexp.
Boiling point
75 to 90exp.
Solubility
Decomposesexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
182.19 g/molcalc.
Exact mass
182.0188 Dacalc.
LogP (octanol/water)
2.81calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
11calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
3calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, C1=CCC=C1

C1=CCC=C1

1 ring, 5 atoms, the Cyclopentadiene ring system.

647 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS05: Corrosive
Corrosive
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H302Harmful if swallowed.
  • H312Harmful in contact with skin.
  • H314Causes severe skin burns and eye damage.
  • H315Causes skin irritation.
  • H317May cause an allergic skin reaction.
  • H318Causes serious eye damage.
  • H319Causes serious eye irritation.
  • H332Harmful if inhaled.
  • H335May cause respiratory irritation.
Precautionary statements (28)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P352If on skin: Wash with plenty of water.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P317Get medical help.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P332 + P317If skin irritation occurs: Get medical help.
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P363Wash contaminated clothing before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 1325

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Chromocene suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 5 suppliers
5 of 5 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

5 suppliers in 5 countries

Send one request to many suppliers

Choose up to 10 suppliers or let us match your request. Compare quotes side by side, free.

Choose suppliersPost a request

Chromocene price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

Get latest price

Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Chromocene is traded under.

HS 2902.90Indicative HS code

Cyclic hydrocarbons, other

World exports in 2024
$612M
−6.1% vs 2023, imports $670M
2019 to 2024
Top exporters
  1. China28.0%
  2. Germany13.9%
  3. India * partner reported12.6%
Top importers
  1. Germany11.1%
  2. United States10.6%
  3. South Korea8.3%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Chromocene is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Chromocene, based on the data on this page

What is Chromocene?

Bis(cyclopentadienyl)chromium appears as red needles or reddish-purple solid. (NTP, 1992)

What is the CAS number of Chromocene?

The CAS registry number of Chromocene is 1271-24-5.

What is the molecular formula and weight of Chromocene?

The molecular formula of Chromocene is C10H10Cr and its molar mass is 182.19 g/mol.

Is Chromocene hazardous?

Chromocene carries the GHS signal word "Danger". Main hazards: harmful if swallowed, harmful in contact with skin, causes severe skin burns and eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Chromocene?

Chromocene is usually classified under HS code 290290 (Cyclic hydrocarbons, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Chromocene?

CompoundList lists 5 suppliers of Chromocene in Germany, Finland, Russia, Singapore and 1 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Chromocene?

Suppliers quote Chromocene on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Chromocene

Get quotes for Chromocene

Post one free request with your grade, quantity and destination. Matching suppliers send quotes you can compare side by side.
Post a request Sell Chromocene
Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
Embed this structure on your websiteShow code

Paste this code into your page to show the 2D structure of Chromocene with a 3D view, its CAS number where known and a link back to this page. Free to use with the link kept.

<iframe src="https://www.compoundlist.com/embed/structure/chromocene-1271-24-5" title="Chromocene structure on CompoundList" width="360" height="420" style="border:1px solid #E7E2DA;border-radius:12px;max-width:100%" loading="lazy" referrerpolicy="strict-origin-when-cross-origin"></iframe>
Preview the embed

Explore more in Organometallic compounds or HS code 290290

5 suppliers
Free quotes, contact stays private
Get quotes