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By certification 
Item Top grade First-grade
Purity,%≥ 99.8 99
Moisture,% ≤ 0.1 0.2
PH value 7.5-9.5
Ash,% ≤ 0.03 0.05
Water dissolve
test of formad
ehydeTurbidity
(kaolin)≤ 20 30
Chromo(Hazen)
Unit-(Pt-Co)≤ 20 30
Purity,%≥ 99.8 99
Moisture,% ≤ 0.1 0.2
PH value 7.5-9.5
Ash,% ≤ 0.03 0.05
Water dissolve
test of formad
ehydeTurbidity
(kaolin)≤ 20 30
Chromo(Hazen)
Unit-(Pt-Co)≤ 20 30
