The present invention relates to an impact copolymer polypropylene composition comprising a polymer matrix which is selected from propylene homopolymer, propylene copolymer, and a mixture thereof; and an ethylene-propylene rubber phase dispersed in the polymer matrix, wherein the ethylene-propylene rubber phase is in an amount ranging from 4-10 wt % of the impact copolymer polypropylene composition and an amount of ethylene in the ethylene-propylene rubber phase is in a range of 35-45 mol % and a ratio of an intrinsic viscosity of the ethylene-propylene rubber phase to an intrinsic viscosity of the polymer matrix is in a range of 0.8-1.1. The composition according to the present invention is suitable for molding articles, such as containers or packaging which can be subjected to sterilization while still maintaining clarity and high impact strength.