Guyana Exports of sulfates, alums, peroxosulfates (persulfates) to Antigua and Barbuda was US$23 during 2020, according to the United Nations COMTRADE database on international trade. Guyana Exports of sulfates, alums, peroxosulfates (persulfates) to Antigua and Barbuda - data, historical chart and statistics - was last updated on June of 2024.