Safe for plants and humans, monopotassium phosphatehas a moderately low ph level and low salt index. Monopotassium phosphate is used in fertilizer, to offer phosphorus and potassium to plants. As a nitrogen free fertilizer, monopotassium phosphate is water-soluble. in addition to this, monopotassium phosphate acts as a suppressor of powdery mildew. chemical specification molecular formula :kh2po4 molecular weight :136.086 gmol-1 grade industrial gradeagriculture grade