Tonga Imports from New Zealand of Sulfates, Alums, Peroxosulfates (Persulfates) was US$74 during 2012, according to the United Nations COMTRADE database on international trade. Tonga Imports from New Zealand of Sulfates, Alums, Peroxosulfates (Persulfates) - data, historical chart and statistics - was last updated on June of 2024.