Appearance  

Light yellow to yellowish brown amorphous solid

The mass fraction of all iron, % 

19.5 min

The mass fraction of reducing substance (Fe2+), %

0.15 max

Basicity, %

8.0-16.0

PH value (10gL aqueous solution)  

1.5-3.0

Mass fraction of insoluble matter, %

0.4 max

The mass fraction of arsenic (As), %

0.0002 max

The mass fraction of lead (Pb), %

0.0004 max

The mass fraction of cadmium (Cd), %

0.0001 max

The mass fraction of mercury (Hg), %

0.00002 max

The mass fraction of chromium (Cr), %

0.001 max

The mass fraction of zinc (Zn), %

0.01 max

The mass fraction of nickel (Ni), %

0.01 max