Imports In 2022, Bhutan imported $1.02k in Oxalic acid, its salts & esters, becoming the 144th largest importer of Oxalic acid, its salts & esters in the world. At the same year, Oxalic acid, its salts & esters was the 2648th most imported product in Bhutan. Bhutan imports Oxalic acid, its salts & esters primarily from: India ($1.02k).