Appearance: The appearance of potassium dihydrogen phosphate should be colorless tetragonal crystals or white crystalline powder, so if the appearance of the product is a small crystal or crystalline powder is normal, it can not be judged as true or false.
Content of potassium dihydrogen phosphate content (based on dry basis) According to HG2321-92 standard regulated agricultural products ≥ 92%, agricultural products ≥ 96%, but most of the current market circulation marked ≥ 98%.
Please pay attention when purchasing: (1) The real genuine product should be marked with potassium dihydrogen phosphate content (dry basis) ≥ 98%, but can not be marked with other various elements total content ≥ 98%, or other with total substance content ≥ 98 % and other products that confuse concepts. (2) In some products, even if the content of potassium dihydrogen phosphate reaches 98%, it is strictly speaking also a substandard product, because the potassium oxide in the product is specified in accordance with the standard of potassium dihydrogen phosphate (HG2321-92). The content (K2O) must satisfy: K2O ≥ 33.2%.
The price of genuine monobasic potassium dihydrogen phosphate due to its high nutrient content, the price is relatively high, if the price is very low, the possibility of false products is very large, be sure to pay attention when buying.
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