Appearance white crystal or powder

Purity 99.7%min

Melting point 165-168°C

Loss on drying 0.1% max

Ignition residue 0.1% max

Color 5 APHA max

Iron(Fe) 5 ppm max

Heavy metal 5 ppm max

Chloride 5 ppm max

Sulfate 20 ppm max

Cu 1 ppm max

Mn 1 ppm max