洗碗机盐是专为家用或商用洗碗机中的软水系统复原设计的高纯度结晶颗粒状氯化钠（NaCl）。它是一种特定的工业级盐，其颗粒尺寸要大于普通食盐，以确保在软水器单元中能够缓慢溶解，避免微小颗粒堵塞复杂的系统结构。
Not exactly. While all are mostly sodium chloride, rock salt often contains more impurities and different grain sizes that can cause damage. Water softener salt is usually similar but check the grain size is suitable for your dishwasher's mechanism. tesco dishwasher salt safety data sheet best