Imports In 2021, Brunei imported $26.3k in Calcium phosphates except hydrogen-orthophosphate, becoming the 0th largest importer of Calcium phosphates except hydrogen-orthophosphate in the world. At the same year, Calcium phosphates except hydrogen-orthophosphate was the 0th most imported product in Brunei. Brunei imports Calcium phosphates except hydrogen-orthophosphate primarily from: N/A.