Appearance: White sheet crystals
Melting point: 92~96篶
Assay:≥98%
Loss on drying: <0.5%
Ignition residue: < 0.5%
Color reaction of ferric chloride: Negative
Heavy metal: <10ppm
Arsenic: <2ppm
Pathogen: Bacteria count<300 CPU Fungus<100 CPU