Singapore Exports of unsaturated acyclic or cyclic monocarboxylic acids, their anhydrides to Macau was US$745 during 2016, according to the United Nations COMTRADE database on international trade. Singapore Exports of unsaturated acyclic or cyclic monocarboxylic acids, their anhydrides to Macau - data, historical chart and statistics - was last updated on May of 2024.