The second reason is that there is not tight control from the government. Thus, it is not for food preservative, it will be very dangerous to human’s body. Forma lin in biology is a 10% solution of formaldehyde in water which is usually used as a disinfectant or to preserve biological specimens.
Firstly, formalin is not for human beings, but it is for biological specimen and experiments.
The use of formalin and other dangerous preservatives in food has been a serious for two reasons.