Are food desiccant packets toxic?

Release Time：

2019-02-19

Food desiccant materials vary, and while I know most are generally non-toxic, it's best to avoid contact.

Food desiccant There are various materials, and although most are non-toxic, it is best to avoid skin contact.

Currently, food desiccants generally come in four types: one is transparent silica gel, which is non-toxic and requires no treatment if ingested; another is ferric oxide, which is brown and has mild irritation; there are also two types of white powder, one is calcium chloride, which only has mild irritation; the other is calcium oxide, also known as quicklime, which is a white or grayish-white lump with a strong ability to absorb moisture from the air. Because calcium oxide releases heat during the process of turning into calcium hydroxide when it encounters water, it can burn the eyes, mouth, or esophagus. At the same time, calcium hydroxide is alkaline and corrosive to the pharynx and esophagus; if it splashes into the eyes, it can also cause damage to the conjunctiva and cornea. However, because lime desiccants are relatively low in cost, but have a moisture absorption rate of about 30%, and can always maintain good moisture absorption performance, they are widely used in the packaging of children's food such as seaweed, rice cakes, candies, and dried fish, which require higher dryness.

The first two are insoluble in water, while the last two are soluble in water. Currently, quicklime is the most commonly used on the market. In fact, none of these are considered toxic; they are basically corrosive substances.

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