Amp citrate refers to a type of salt that has a strong ability to chelate calcium ions at low temperatures, but the chelating ability decreases as the temperature rises. Its ability to chelate magnesium ions is related to the pH of the solution. At pH 7-9, 20-50 degrees Celsius, and the molar ratio of citric acid to magnesium ions is 1:1, 116 mg of magnesium ions per gram of citric acid can be chelated, that is, more than 90% of magnesium ions can be chelated. In addition to alkaline earth metals, it can effectively chelate most divalent and trivalent metal ions.
In the presence of ammonia, it can more completely chelate metal ions. But if the temperature exceeds 60 degrees Celsius, the chelating effect is very poor.Amp citrate does not contain nitrogen, phosphorus and other elements, and has good biodegradability. From ecological considerations, it will not produce "over-fertilization" and is the safest.