To provide a composition containing one or more cyclopropene complexes each composed of a small amount of water and a large amount of cyclopropene.

A composition is provided which is a composition containing (a) one or more cyclopropene complexes and (b) 0-10 wt.%, based on the weight of the composition, water, wherein the molar ratio of cyclopropene in the composition to molecular encapsulating agent in the composition is 0.92:1 or higher, or wherein the composition is in the form of a powder, and in a two-dimensional image of a representative sample of the powder, 20% or more of the area of the images of the particles of the cyclopropene complexes based on the area of all the images of all the particles of the cyclopropene complexes in the image of the sample, is in the form of particles of the cyclopropene complexes having width dimension of 10 m or larger. A method for producing a composition comprising the cyclopropene complex is also provided.