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style="background: #F8EABA; text-align: center;" colspan="2" | Identifiers
CAS number 23978-09-8 YesY
PubChem 72801 YesY
ChemSpider 65637 YesY
EC number 245-962-4
MeSH Cryptating+agent+222
RTECS number MP4750000
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InChI Script error: No such module "collapsible list".
style="background: #F8EABA; text-align: center;" colspan="2" | Properties
Molecular formula C18H36N2O6
Molar mass 376.49 g/mol
 YesY (what is this?)  (verify)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references
File:Cryptate of pottasium cation.jpg
Structure of a [2.2.2]cryptand encapsulating a potassium cation (purple). At crystalline state, obtained with an X-ray diffraction.[1]

2,2,2-Cryptand is one of the most important member of the cryptand family of chelating agents. In Nomenclature of Inorganic Chemistry (2005), IUPAC recommends the abbreviation "crypt-222".


  1. Alberto, R.; Ortner, K.; Wheatley, N.; Schibli, R.; Schubiger, A. P. (2001). "Synthesis and properties of boranocarbonate: a convenient in situ CO source for the aqueous preparation of [99mTc(OH2)3(CO)3]+". J. Am. Chem. Soc. 121: 3135–3136. doi:10.1021/ja003932b.