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Silica Gel Side Effect When Eated

Silica gel classified by the FDA as a Generally Recognized as Safe (GRAS) product, however,all packets of clear silica gel carry a warning label or hazard symbol. Although technically non-toxic, silica gel's moisture-absorption properties can cause mild nausea, constipation and vomiting if ingested. Most poison control centers do not consider ingestion of clear silica gel to be an emergency. A second type of silica gel is called "indicator" gel because of its ability to change color when exposed to moisture such as blue silica gel, orange silica gel. Indicator gel dyed blue using cobalt chloride, a toxic chemical believed to be carcinogenic and cause respiratory irritation, turns pink when exposed to moisture. If ingested, poison control or 911 should be called and informed of the ingestion of cobalt chloride.
Silica gel ingested through the eating of a packet or the eating of "clumping" cat litter will most likely cause a gastrointestinal upset that could include nausea and vomiting. Consumed in large doses or repeatedly over time, silica gel can cause intestinal blockage.