Moisture inhibitors in food are generally alkaline chemicals. The main ones are lime and silica gel. If you accidentally eat lime moisture-proof agent, due to water into calcium hydroxide in the process of releasing heat, will burn the oral cavity or esophagus. At the same time, calcium hydroxide is alkaline, corrosive to the oropharynx and esophagus, such as splashing into the eyes will cause damage to the conjunctiva and cornea. Silica gel is another commonly used moisture-proofing agent. Due to the porous structure of this substance, it has a large adsorption area and is capable of adsorbing a wide range of substances. The color in silica gel is added cobaltous chloride, which is used to indicate efficacy. Cobaltous chloride in cobaltous chloride is toxic and harmful to the human body, if accidentally taken should immediately seek medical attention.