Buffer preparation, determination of arsenic, antimony, phosphorus, aluminum and iron, preparation of phosphorus standard solution, preparation of haploid sports species with various media, determination of serum inorganic phosphorus, alkaline enzyme activity, preparation of bacterial serum test Leptospira The culture medium and so on. 
It is used as a buffer and culture agent in industry; it is also used as a bacterial culture agent to synthesize a flavoring agent for clearing, a raw material for preparing potassium metaphosphate, a brewing yeast culture agent, a fortifier, a leavening agent, and a fermentation aid.
It is used as a high-efficiency phosphorus and potassium compound fertilizer in agriculture; potassium dihydrogen phosphate products are widely used in almost all types of crops, such as various types of economic crops, grains, fruits, vegetables, etc., all of which are experts from local agricultural institutes, soil and fertilizer stations, etc. The agency has applied a large number of relevant application experiments for potassium dihydrogen phosphate to various types of typical crops. Through actual application effects of various types of crops in different regions, it has been demonstrated that potassium dihydrogen phosphate has significant yield increase, quality optimization, resistance to lodging, resistance to pests and diseases. The prevention and treatment of premature aging and many other good effects, and has the effect of overcoming the nutritional deficiencies caused by the decline in the ability of the roots to absorb the aging of the crop growth. Potassium dihydrogen phosphate is a new type of high-concentration phosphorus and potassium two-element compound fertilizer, which contains about 52% of phosphorus pentoxide and about 34% of dipotassium oxide. Flue-cured tobacco requires large amounts of phosphorus and potassium, especially large quantities of potassium. Potassium dihydrogen phosphate is an ideal new fertilizer for flue-cured tobacco. In order to explore the use value of potassium dihydrogen phosphate on flue-cured tobacco and the application method to improve the quality of tobacco leaf. Potassium dihydrogen phosphate used on cotton can control cotton growth and increase the number of flower buds. Potassium dihydrogen phosphate is widely used in drip irrigation systems.