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The desiccant in the shoe box is granular white crystal, like salt, is it toxic?
The desiccant in shoes is generally silica gel desiccant, which is nontoxic.

Don't be nervous after eating by mistake. Will not cause harm to the human body and will not be absorbed by the human body. You can drink some milk after eating by mistake, so that the silica gel desiccant will soon be discharged with human feces.

Silica gel desiccant is a kind of highly active adsorption material, which is usually made by a series of post-treatment processes such as reaction of sodium silicate with sulfuric acid, aging and acid bubble. Silica gel desiccant has high adsorption performance, good thermal stability, stable chemical properties and high mechanical strength.

Extended data

Uses of silica gel desiccant:

1, silica sol has a high specific surface area and can be used for catalyst manufacturing and catalyst carrier.

2. Used in paper industry, it can be used as cellophane anti-sticking agent, photographic paper pretreatment agent, cement bag anti-slip agent, etc.

3. Used as sizing agent in textile industry, it can be used together with oil agent to treat the spinnability of wool and rabbit hair, reduce broken ends, prevent flying, improve finished products and increase economic benefits.

4. Used as treating agent for silicon steel sheet, dispersant for kinescope and anti-skid agent for floor wax.

Baidu encyclopedia-silicic acid xerogel (silica gel desiccant)