Properties: Green crystals with specific gravity of 1. 921, soluble in water and ethanol, deliquescent in moist air.
	Specification(%):
	Index Assay (Ni) 24%min Water-insoluble matter 0. 01%max SO4 0. 02%max NO3 0. 01%max Co 0. 002%max Zn 0. 0005%max Fe 0. 0005%max Cu 0. 0005%max Pb 0. 0005%max