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12-crown-4 skeletal.svg
12-Crown-4 molecule
CAS number 294-93-9 YesY
ChemSpider 8912 YesY
ChEBI CHEBI:32399 YesY
Jmol-3D images Image 1
Image 2
Molecular formula C8H16O4
Molar mass 176.21
Density 1.089 g/mL at 25 deg C
Melting point 16 deg C
Boiling point 61-70 deg C/0.5 mm Hg
Flash point 113 °C (235 °F; 386 K)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

12-Crown-4, also called 1,4,7,10-tetraoxacyclododecane and Lithium Ionophore V, is a crown ether with the formula C8H16O4. It is a cyclic tetramer of ethylene oxide which is specific for the lithium cation:

Ball-and-stick model of the bis(12-crown-4)lithium cation


See also[edit]

  • Crown ether
  • Cyclen, a similar molecule with N atoms (aza groups) instead of O atoms (ethers)