Imports In 2021, Guinea-Bissau imported $202 in Potassium hydroxide (caustic potash), becoming the 0th largest importer of Potassium hydroxide (caustic potash) in the world. At the same year, Potassium hydroxide (caustic potash) was the 0th most imported product in Guinea-Bissau. Guinea-Bissau imports Potassium hydroxide (caustic potash) primarily from: N/A.