The law says it is illegal to use traditional alum food additives to fry doughnuts?

Fried doughnuts in the alum is potassium aluminum sulfate, in the production of doughnuts can be used, the role of the bulking agent and stabilization,

As long as the use of alum in accordance with the required amount to use, the final requirements of aluminum residues ≤ 1,000 mg / k g (dry samples, to A l), so that it is not a violation of the law.

Food additives are related to the content, in the limit range is generally not illegal