3-3.5 mg potassium sorbate for 500 grams of water 10 kg of kimchi potassium sorbate is 0.05% ~ 0.07%. According to the relevant information, there is a prescribed dosage standard for potassium sorbate as a food preservative. According to the regulations, the dosage of potassium sorbate in kimchi is 0.05% ~ 0.07%, and the dosage of 500 grams of water is 3 to 3.5 mg.