It is used as buffer, chelating agent, stabilizer, antioxidant, emulsifier and flavoring agent in food industry. Potassium citrate can also be used in milk and dairy products, jelly, jam, meat, canned hydrogel snacks, emulsification of cheese, preservation of citrus, etc. It is used in medicine industry for hypokalemia, potassium deficiency and alkalized urine. Product Standard of PotAssium Citrate (GB14889—94) Index Name Index 1. Potassium citrate (on dry basis) ≥99.0%2. Alkalinity 5% aqueous solution is alkaline to litmus, but after adding 0.2mL of 0.1mol/L sulfuric acid to 10mL of this solution, a drop of phenolphthalein reagent is added, and no pink appears. 3. Arsenic (as) ≤ 0.0.