Appearance: White crystalline powder
PH: 5.5~7.5
Loss on drying: NMT1.0%
Residue on Ignition: NMT0.5%
Heavy Metals: NMT5ppm
Arsenic: NMT3ppm
Lead: NMT1ppm
Potassium: 17.0~21.0%
Fluoride: NMT3ppm
Selenium: NMT10ppm
Assay: 99.0% min
Shelf life: 24 months mini.
