Appearance: White needle crystal
Melting point: 153~156篊
Assay:≥99.0%
Loss on drying: <0.5%
Ignition residue: < 0.5%
Ferrum: <10ppm
Heavy metal: <3ppm
Arsenic: <1ppm
Chloride: <50ppm
Pathogen: Bacteria count<300 CPU Fungus<100 CPU