Appearance: White to yellowish powder
Purity: (same/more than) 98%
Loss on drying: (same/less than) 12.0%
Chloride: (same/less than) 0.02%
Ammonium: (same/less than) 0.02%
Heavy metals: (same/less than) 10ppm
Residue on ignition: (same/less than) 0.02%