Switzerland Imports of sulfates, alums, peroxosulfates (persulfates) from St Kitts and Nevis was US$7 during 2022, according to the United Nations COMTRADE database on international trade. Switzerland Imports of sulfates, alums, peroxosulfates (persulfates) from St Kitts and Nevis - data, historical chart and statistics - was last updated on May of 2024.