Appearance: white crystal
Assay£¨AR): 99% min
Molar absorptivity of iron complex £¨L/cm.mol £©: Min. 1.15 X 10⁴
Dissolution test in ethanol:   qualified
Residue on ignition (as Sulfate) £º 0.1% max.
Moisture£º 8.5-10.0%min