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Aldehydes and ketones

Cyclobutanone

Also known as cyclobutanon, cylcobutanone, cylobutanone

CAS 1191-95-3Formula C4H6OMolar mass 70.09 g/molEC 214-745-6
GHS signal word: Danger. Pictograms: Flammable 18 suppliers listed
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Cyclobutanone chemical structure, C4H6O, CAS 1191-95-3
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
1191-95-3
Formula
C4H6O
Molar mass
70.09 g/mol
Physical form
Liquid
HS code
291429
Category
Aldehydes and ketones
Illustrative photo, 200 litre steel drums of liquid in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Cyclobutanone?

Plain description, key identifiers and synonyms

Cyclobutanone is a chemical substance with the molecular formula C4H6O and a molar mass of 70.09 g/mol. Its CAS registry number is 1191-95-3.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
cyclobutanone
CAS number
1191-95-3 CAS number cross-checked
EC number
214-745-6
Molecular formula
C4H6O
UNII
6PF2SH405U
MDL number
MFCD00001332
InChIKey
SHQSVMDWKBRBGB-UHFFFAOYSA-N
InChI
InChI=1S/C4H6O/c5-4-2-1-3-4/h1-3H2
SMILES (canonical and isomeric)
C1CC(=O)C1

Synonyms

  • cyclobutanon
  • cylcobutanone
  • cylobutanone
  • 3-cyclobutanone
  • Cyclobutanone, 99%
  • Cyclobutanone (stabilized with Na2CO3)
  • Cyclobutanone - stabilise 0.01 % BHT
  • Cyclobutanone (stabilized with 0.1% BHT)

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
Liquidexp.

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
70.09 g/molcalc.
Exact mass
70.0419 Dacalc.
LogP (octanol/water)
0.74calc.
Topological polar surface area
17.07 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
5calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.75calc.
Formal charge
0calc.
Stereocentres
0calc.
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, O=C1CCC1

O=C1CCC1

1 ring, 5 atoms. This chemical is the scaffold itself.

688 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS02: Flammable
Flammable

Hazard statements

  • H225Highly flammable liquid and vapour.
  • H226Flammable liquid and vapour.
Precautionary statements (11)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P233Keep container tightly closed.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P242Use non-sparking tools.
  • P243Take action to prevent static discharges.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • P501Dispose of contents and container in accordance with local regulations.

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

Cyclobutanone suppliers

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

All 18 suppliers
18 of 18 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

18 suppliers in 6 countries

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Cyclobutanone 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.

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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 Cyclobutanone is traded under.

HS 2914.29Indicative HS code

Cyclanic, cyclenic or cycloterpenic ketones without other oxygen function, other

World exports in 2024
$1B
+6.6% vs 2023, imports $980M
2019 to 2024
Top exporters
  1. China32.5%
  2. India * partner reported12.9%
  3. Germany12.3%
Top importers
  1. United States15.7%
  2. Japan8.7%
  3. Germany8.7%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Cyclobutanone?

Cyclobutanone is a chemical substance with the molecular formula C4H6O and a molar mass of 70.09 g/mol. Its CAS registry number is 1191-95-3.

What is the CAS number of Cyclobutanone?

The CAS registry number of Cyclobutanone is 1191-95-3.

What is the molecular formula and weight of Cyclobutanone?

The molecular formula of Cyclobutanone is C4H6O and its molar mass is 70.09 g/mol.

Is Cyclobutanone hazardous?

Cyclobutanone carries the GHS signal word "Danger". Main hazards: highly flammable liquid and vapour, flammable liquid and vapour. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Cyclobutanone?

Cyclobutanone is usually classified under HS code 291429 (Cyclanic, cyclenic or cycloterpenic ketones without other oxygen function, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Cyclobutanone?

CompoundList lists 18 suppliers of Cyclobutanone in China, Canada, India, United States and 2 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Cyclobutanone in India?

2 suppliers in India list Cyclobutanone on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Cyclobutanone?

Suppliers quote Cyclobutanone 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 Cyclobutanone

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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