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By certification 
Item Synthetic Cryolite
Purity% Min 98.0
F% Min 53.0
Na% Min 32.0
Al % Min 13.0
SiO2 % Max 0.25
Fe2O3% Max 0.05
SO4% Max 0.5
CaO % Max 0.20
P2O5% Max 0.03
H2O% Max 0.20
Ignite on 550 ℃ Max 2.5
Purity% Min 98.0
F% Min 53.0
Na% Min 32.0
Al % Min 13.0
SiO2 % Max 0.25
Fe2O3% Max 0.05
SO4% Max 0.5
CaO % Max 0.20
P2O5% Max 0.03
H2O% Max 0.20
Ignite on 550 ℃ Max 2.5
