Cyclopropane

Cyclopropane is the cycloalkane with the molecular formula (CH2)3, consisting of three methylene groups (CH2) linked to each other to form a triangular ring. The small size of the ring creates substantial ring strain in the structure. Cyclopropane itself is mainly of theoretical interest but many of its derivatives - cyclopropanes - are of commercial or biological significance.

Cyclopropane
Names
Preferred IUPAC name
Cyclopropane
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.000.771
KEGG
PubChem CID
UNII
UN number 1027
  • InChI=1S/C3H6/c1-2-3-1/h1-3H2 Y
    Key: LVZWSLJZHVFIQJ-UHFFFAOYSA-N Y
  • InChI=1/C3H6/c1-2-3-1/h1-3H2
    Key: LVZWSLJZHVFIQJ-UHFFFAOYAL
SMILES
  • C1CC1
Properties
C3H6
Molar mass 42.08 g/mol
Appearance Colorless gas
Odor Sweet, ethereal
Density 1.879 g/L (1 atm, 0 °C)
680 g/L (liquid)
Melting point −128 °C (−198 °F; 145 K)
Boiling point −32.9 °C (−27.2 °F; 240.2 K)
502 mg/L
Vapor pressure 640 kPa (20 °C)
1350 kPa (50 °C)
Acidity (pKa) ~46
Magnetic susceptibility (χ)
 -39.9·10−6 cm3/mol
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Highly flammable
Asphyxiant
GHS labelling:
Danger
NFPA 704 (fire diamond)
1
4
0
SA
495 °C (923 °F; 768 K)
Explosive limits 2.4 % (lower)
10.4 % (upper)
Safety data sheet (SDS) Air Liquide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Cyclopropane was used as a clinical inhalational anesthetic from the 1930s through the 1980s. The substance's high flammability poses a risk of fire and explosions in operating rooms due to its tendency to accumulate in confined spaces, as its density is higher than that of air.

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