皓こう礬ばんMeanings1nounzinc sulfate heptahydrate; white vitriolTechnical term for a chemical compound; rarely encountered outside specialized contexts.皓こう礬ばんは、亜あ鉛えんめっきや顔がん料りょうの原げん料りょうとして使つかわれることがある。Zinc sulfate heptahydrate is sometimes used as a raw material for zinc plating and pigments.