Is it toxic if desiccant is soaked in boiling water and then consumed?

Generally, whether drinking water boiled with a desiccant is toxic depends on the type of desiccant. Silica gel types are relatively safe, while quicklime (calcium oxide) and calcium chloride types may be toxic. If in doubt, it is recommended to seek medical advice promptly. Detailed analysis is as follows:

If the water was steeped with silica gel desiccant, the risk is low because silica gel is chemically stable, insoluble in water, and not significantly toxic. Drinking a small amount typically causes no serious discomfort, although minor gastrointestinal symptoms might occur due to impurities. In such cases, drink plenty of water to promote metabolism and closely monitor your physical condition.

If the water was steeped with desiccants such as quicklime (calcium oxide) or calcium chloride, risks are significantly higher. Quicklime reacts with water to form calcium hydroxide, which is highly corrosive and may burn the mouth, esophagus, and gastrointestinal tract. Excessive ingestion of calcium chloride may also cause nausea, vomiting, and other symptoms. In these cases, stop drinking immediately and seek emergency medical attention.

Desiccants should always be stored separately from food and beverages to prevent accidental misuse. If you accidentally drink water that has been steeped with a desiccant, try to recall the desiccant type and inform your doctor. Do not induce vomiting before seeing a doctor, as this may worsen damage to the digestive tract.