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silicon dioxide

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Description

Appearance	White powder
Purity (SiO2, %)	>= 96
Oil absorption (cm3/g)	2.0~ 3.0
Loss on drying (%)	4.0~ 8.0
Loss on ignition (%)	=<8.5
BET (m2/g)	170~ 240
pH (10% solution)	5.0~ 8.0
Sodium sulfate (as Na2SO4, %)	=<1.0
Arsenic (As)	=< 3mg/kg
Lead (Pb)	=< 5 mg/kg
Cadium (Cd)	=< 1 mg/kg
Mercury (Hg)	=< 1 mg/kg
Total heavy metals (as Pb)	=< 20 mg/kg
Total plate count	=<500cfu/g
Salmonella spp./ 10g	Negative
Escherichia coli/ 5g	Negative

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