Item

Details

Best quality

First quality

Qualifier

HF-40

HF-70

HF-40

HF-55

HF-40

HF-55

hydrogen fluoride %≥

40.0

70.0

40.0

55.0

40.0

55.0

fluorosilicic acid %≤

0.02

0.02

0.2

0.5

2.5

5.0

fixed acid(H₂SO₄)%≤

0.02

0.02

0.05

0.08

1.0

2.0