A chemical salt containing two sulfate groups or one hydrogen sulfate group bonded to a metal or other compound.
From bi- (two) + sulfate (from sulfur + -ate). Sulfate comes from sulfur, possibly from Latin sulfur. Chemical nomenclature developed in the 18th-19th centuries.
Bisulfates are used in wood pulping, water treatment, and bathroom cleaners—they're invisible chemical workhorses that enable modern sanitation and paper production, affecting billions of people daily without anyone knowing their names.
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