Assay(Nacl) %

≥99.9

Loss on dry %

≤0.15

Insoluble in water   %

≤0.05

SO₄^2-   %

≤0.07

Ca mg/kg

≤15

Mg mg/kg

≤1.0

Fe mg/kg

<5.0

Cd mg/kg

<0.1

As mg/kg

<0.5

Cu mg/kg

<0.5

Pb mg/kg

<1.0

Hg mg/kg

<0.1

Ba mg/kg

<15

KIO₃   mg/kg

0

Anti-caking   agent[Fe(CN₆)^4- mg/kg

≤10

Granular size

150-850μm

85% min