: a white crystalline compound K2SO4 used especially as a fertilizer
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In addition to water and carbonation, it’s infused with minerals such as sodium bicarbonate, potassium sulfate, or sodium chloride.—Emily Price, Forbes.com, 2 Apr. 2025 Ingredients like sodium, potassium bicarbonate, and potassium sulfate give club soda its salty, mineral taste.—Alison Mango, Health, 1 June 2024 Potash, or potassium sulfate, is currently mined in regions including Carlsbad, New Mexico and at Utah’s Bonneville Salt Flats, where the Bureau of Land Management also oversees a private company’s potash mining operations.—The Salt Lake Tribune, 1 Aug. 2023 The only catch: Check the label for preservatives like potassium sulfate or sodium benzoate, both of which can kill the yeast required for fermentation.—Justin Pot, WSJ, 7 Sep. 2022 Three of the derailed cars were carrying potassium sulfate, which is used to make fertilizer.—oregonlive, 29 Sep. 2019
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