Anhydrous Hydrofluoric Acid

index	Superior Grade	Grade I	qualified
HF %≥	99.98	99.90	99.7
H20 %≤	0.01	0.06	0.10
H2SiF6 %≤	0.006	0.020	0.050
SO2   %≤	0.001	0.015	0.030
H2SO4  %≤	0.003	0.020	0.050