Appearance: White or off-white crystal powder

Assay: 99.0%～100.5%

Solubility: Very soluble in water, ethanol, methanol, chloroform practically insoluble in ether

Melting Point: 112.0～118.0℃

Identification: Chloride, UV.

Loss on drying: 0.5%max

Residue on ignition: 0.1%max

Heavy metals: 10ppm max

Readily oxidarle substances: conforms                          

Related substances: 0.5%max

Benzoic acid: 0.1%max

Arsenic: 1ppm max

Residual solvents:

Ethanol: 0.5% max

Toluene: 0.089% max

Acetone: 0.5% max

Particle size:

  D(10%):5～60μm

D(50%):10～150μm

D(90%):100～350μm

Package: 25kg/fibre drum