Relative density (20 ℃) _

1.19

PH value (1% aqueous solution)

3.5 ~ 4.5

3.5 ~ 4.5

Alumina (AL2O3) content%

10.0

29

Iron oxide (Fe2O3) content%

1 ~ 2

2 ~ 3

Salinity,%

60 ~ 95

60 ~ 95

Water insoluble content,%

0.3

1.0