Is Ammonium Sulfate Edible? The Crucial Difference Between Food Grade and Industrial
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4 min read
Ammonium sulfate, a compound with multiple industrial uses, is also a legally approved food additive known as E517 or "Generally Recognized As Safe" (GRAS) by the FDA, but only when specifically manufactured to meet strict food-grade standards. This distinction is critical for consumer safety, as the industrial version, commonly sold as fertilizer, contains impurities and is not safe for consumption.