Quality index

Index
Ingredients
Grade

HF % ≥

H2O % ≤

SO2 % ≤

Involatile acid
(as H2SO4) % ≤

H2SIF6 % ≤

Premium grade

99.98

0.01

0.001

0.003

0.006

Top grade

99.95

0.03

0.007

0.005

0.010

First grade

99.90

0.06

0.015

0.020

0.020

Qualified product

99.70

0.10

0.030

0.050

0.050

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