The Collaborative International Dictionary of English v.0.48:

Intangibility \In*tan`gi*bil"i*ty\, n.; pl. Intangibilities.
   [Cf. F. intangibilit['e].]
   The quality or state of being intangible; intangibleness.
   [1913 Webster]

WordNet (r) 3.0 (2006):

intangibility
    n 1: the quality of being intangible and not perceptible by
         touch [syn: intangibility, intangibleness,
         impalpability] [ant: palpability, tangibility,
         tangibleness]