Imports In 2020, Brunei imported $4.94k in Hexamethylenediamine, its salts, becoming the 0th largest importer of Hexamethylenediamine, its salts in the world. At the same year, Hexamethylenediamine, its salts was the 0th most imported product in Brunei. Brunei imports Hexamethylenediamine, its salts primarily from: N/A.