Item

Reagent Grade

Technical Grade

Content（Na2SO4)%

≥99.5

≥99.5

Water Insolubles %

≤0.02

≤0.02

Arsenic(As)%

≤0.0002

≤0.0005

Heavy Metal(as Pb)%

≤0.002

≤0.002

Ferrum(Fe)%

≤0.0015

≤0.001

Chloride（Cl）%

≤0.005

≤0.05

Moisture %

—

≤0.15

Loss in weight on burning %

≤0.5

—

Nitrate（NO3） %

≤0.002

—

Ammonium Salt（NH4） %

≤0.002

—

Phosphate（PO4） %

≤0.002

—

Magnesium (Mg） %

≤0.002

—