Alkyloxirane derivative, cosmetic material for hair, hydraulic oil composition, resin composition curable by actinic rays, and oil cleansing agent

It is provided an alkyloxirane derivative represented by formula (1) below, wherein Mand Mcalculated from a chromatogram obtained by gel permeation chromatography measurement of said alkyloxirane derivative satisfy formula (2) below.Z-[O-(AO)n-H]x ····(1) (Z represents a residual group of a compound having a carbon number of 1 to 22 and one to six hydroxyl groups wherein all of said hydroxyl groups are excluded from said compound; x represents a number of 1 to 6; A O represents an oxyalkylene group having a carbon number of 3; and n represents a number of 25 or more.) 0.35 ≦ M/M≦0.75 ···(2) (Provided that L is assigned to a length of a perpendicular line from the maximum point K at which an intensity of a refractive index on said chromatogram takes the maximum value to a base line B; provided that points O and Q are assigned to two points at which said intensity of said refractive index on said chromatogram is L/2, said point O has a shorter elution time and said point Q has a longer elution time; and provided that P is assigned to an intersecting point where a straight line G connecting said point O and point Q intersects the perpendicular line from said maximum point K to said base line, Mrepresents a distance between said point O and said intersecting point P; and Mrepresents a distance between said point Q and said intersecting point P.)