磷酸二氢钾的吸湿性是其一个重要的化学性质。在空气中，磷酸二氢钾会吸收水分并形成水合物。其吸湿性随相对湿度的升高而增强，当相对湿度超过80%时，磷酸二氢钾会逐渐变成湿性物质，甚形成水溶液。这种吸湿性可能对磷酸二氢钾的应用产生多方面的影响。

The hygroscopicity of potassium dihydrogen phosphate is an important chemical property. In the air, potassium dihydrogen phosphate absorbs water and forms hydrates. Its hygroscopicity increases with the increase of relative humidity. When the relative humidity exceeds 80%, potassium dihydrogen phosphate will gradually become a wet substance and even form an aqueous solution. This hygroscopicity may have multiple impacts on the application of potassium dihydrogen phosphate.

从保存角度来看，磷酸二氢钾的吸湿性可能使得它在潮湿环境下容易受潮结块，降低其流动性和使用效果。这可能导致产品质量下降，甚可能引发问题。因此，在储存磷酸二氢钾时，需要特别注意防潮，确保储存环境的干燥。

From a preservation perspective, the hygroscopicity of potassium dihydrogen phosphate may make it susceptible to moisture and clumping in humid environments, reducing its fluidity and usability. This may lead to a decrease in product quality and even cause safety issues. Therefore, when storing potassium dihydrogen phosphate, special attention should be paid to moisture prevention to ensure a dry storage environment.

从应用角度来看，磷酸二氢钾的吸湿性可能影响其在某些领域的应用效果。例如，在农业领域，作为肥料使用时，如果磷酸二氢钾的吸湿性过强，可能导致肥料在施用前就已经受潮，降低了其肥效。同样，在作为食品添加剂使用时，其吸湿性也可能影响食品的口感和稳定性。

From an application perspective, the hygroscopicity of potassium dihydrogen phosphate may affect its application effectiveness in certain fields. For example, in the agricultural field, when used as fertilizer, if the moisture absorption of potassium dihydrogen phosphate is too strong, it may cause the fertilizer to be damp before application, reducing its fertilizer efficiency. Similarly, when used as a food additive, its hygroscopicity may also affect the taste and stability of the food.

另一方面，磷酸二氢钾的吸湿性也可能在某些特定应用中发挥积极作用。例如，在一些需要保持湿润或需要水分参与的化学反应中，磷酸二氢钾的吸湿性可能有助于促进反应的进行。

On the other hand, the hygroscopicity of potassium dihydrogen phosphate may also play a positive role in certain specific applications. For example, in some chemical reactions that require moisture retention or water participation, the hygroscopicity of potassium dihydrogen phosphate may help promote the progress of the reaction.