Sodium diacetate acts as food preservative, appearing in a multitude of processed foods. It achieves inhibiting the growth of bacteria and fungi, thereby improving preservation. Despite its widespread use| , there are concerns about its potential health effects. Research indicates sodium diacetate might be associated with increased allergy risks.

Hydrochloric acid is a highly corrosive liquid. It possesses a sharp odor and dissolves many materials. Hydrochloric acid finds diverse applications in manufacturing. In the food industry, it's used for synthesis of various chemicals. It also plays a role in removing scale from surfaces. Furthermore, hydrochloric acid enables the digestion of foo