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EC number: 231-130-8
CAS number: 7440-21-3
No signs of irritation.
Jahn and Berthold (1991) studied skin irritation of precipitated
silica by moistening the substance (0.5 g) with 0.5 ml of water and
placing on a skin area of approximately 6.25 cm2.
There were no irritating effects.
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