Appearance

White crystal powder

Na2WO4•2H2O

98%min

WO3

69% min

Mo

0.02%max

As

0.002%max

Cl-

0.03%max

Fe

0.002% max

SO42-

0.02% max

Heavy metal (Pb)

0.002%max

PH

8-9

Water Insoluble Matter

0.01%max