Test Specification

Appearance white granules

Assay >=99.0%

pH of a 5% solution: 5.0-6.0 at 25C

Insoluble matter: </= 0.005%

Residue after ignition: </= 0.005%

Chloride (Cl): </= 5 ppm

Nitrate (NO3): </= 0.001%

Phosphate (PO4): </= 5 ppm

Heavy metals (as Pb): </= 5 ppm

Iron (Fe): </= 5 ppm