Item

Top grade

first grade

Qualified product

Chroma (Pt-Co), No. ≤

10

10

Acidity (as HC1), % ≤

0. 0004

0.0008

0.0010

Moisture, %≤W

0.040

0.050

0.060

Purity, % ≥

99.5

99.0

98.0

Residue on Evaporation, % ≤

0.0005

0.0010

0.0030