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EC number: 231-130-8
CAS number: 7440-21-3
al. (1990) studied
the acute oral toxicity of precipitated silica in rats. Five
male and five female animals were used. The dose was applied by gavage
as aqueous suspension (21.5 ml/kg bw = 237 mg silica/ml suspension). No
acute effects were observed, and the LD50 value was >5,000
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