Imports In 2021, Cocos (Keeling) Islands imported $1.32k in Sodium hydroxide (caustic soda) in aqueous solution, becoming the 0th largest importer of Sodium hydroxide (caustic soda) in aqueous solution in the world. At the same year, Sodium hydroxide (caustic soda) in aqueous solution was the 0th most imported product in Cocos (Keeling) Islands. Cocos (Keeling) Islands imports Sodium hydroxide (caustic soda) in aqueous solution primarily from: N/A.