Namibia Exports of unsaturated acyclic or cyclic monocarboxylic acids, their anhydrides to Spain was US$2 during 2018, according to the United Nations COMTRADE database on international trade. Namibia Exports of unsaturated acyclic or cyclic monocarboxylic acids, their anhydrides to Spain - data, historical chart and statistics - was last updated on May of 2024.