Imports In 2021, Brunei imported $236 in Hydrogen fluoride (hydrofluoric acid), becoming the 0th largest importer of Hydrogen fluoride (hydrofluoric acid) in the world. At the same year, Hydrogen fluoride (hydrofluoric acid) was the 0th most imported product in Brunei. Brunei imports Hydrogen fluoride (hydrofluoric acid) primarily from: N/A.