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Cyclopropene

Also known as 1-Cyclopropene, Cyclopropenylidene, 1-Cyclopropene #

CAS 2781-85-3Formula C3H4Molar mass 40.07 g/mol
Cyclopropene chemical structure, C3H4, CAS 2781-85-3
2D chemical structure

Key facts

What buyers check first

CAS number
2781-85-3
Formula
C3H4
Molar mass
40.07 g/mol
HS code
290219
Category
Hydrocarbons

What is Cyclopropene?

Plain description, key identifiers and synonyms

Cyclopropene is a cycloalkene that consists of cyclopropane having a double bond in the ring. The parent of the class of cyclopropenes. It is a cycloalkene and a member of cyclopropenes.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
cyclopropene
CAS number
2781-85-3 CAS number cross-checkedOther or deprecated CAS: 16165-40-5
Molecular formula
C3H4
UNII
7B8994OHJ0
InChIKey
OOXWYYGXTJLWHA-UHFFFAOYSA-N
InChI
InChI=1S/C3H4/c1-2-3-1/h1-2H,3H2
SMILES (canonical and isomeric)
C1C=C1

Synonyms

  • 1-Cyclopropene
  • Cyclopropenylidene
  • 1-Cyclopropene #

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
40.07 g/molcalc.
Exact mass
40.0313 Dacalc.
LogP (octanol/water)
0.95calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
3calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.33calc.
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, C1=CC1

C1=CC1

1 ring, 3 atoms. This chemical is the scaffold itself.

194 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

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

Cyclopropene suppliers

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

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Cyclopropene 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

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2902.19Indicative HS code

Cyclanes, cyclenes and cycloterpenes, other

World exports in 2024
$979M
+24.3% vs 2023, imports $1B
2019 to 2024
Top exporters
  1. China23.4%
  2. United States20.6%
  3. Germany13.6%
Top importers
  1. India * partner reported9.9%
  2. United States9.8%
  3. South Korea9.5%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Cyclopropene?

Cyclopropene is a cycloalkene that consists of cyclopropane having a double bond in the ring. The parent of the class of cyclopropenes. It is a cycloalkene and a member of cyclopropenes.

What is the CAS number of Cyclopropene?

The CAS registry number of Cyclopropene is 2781-85-3. Other or deprecated CAS numbers: 16165-40-5.

What is the molecular formula and weight of Cyclopropene?

The molecular formula of Cyclopropene is C3H4 and its molar mass is 40.07 g/mol.

Is Cyclopropene hazardous?

No GHS hazard classification for Cyclopropene is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Cyclopropene?

Cyclopropene is usually classified under HS code 290219 (Cyclanes, cyclenes and cycloterpenes, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Cyclopropene?

Post a free request on CompoundList and suppliers of Cyclopropene will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Cyclopropene?

Suppliers quote Cyclopropene 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 Cyclopropene

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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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