Assay (after ignition) 99.0% min

pH (5% soln. @ 25oC) 5.2-9.2

Insol 0.01% max

Cl 0.001% max

Mg 0.001% max

N cpds (as N) 0.005% max

HM (as Pb) 0.0005% max

Ca 0.01 % max

K 0.01 % max

As 0.0001 % max

Fe 0.0002 % max

Cu 0.0002 % max

Pb 0.0002 % max

Se 0.03 % max

LOD 1.0% max

LOI 0.5% max

Conforms to ACS