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EC number: 231-743-0
CAS number: 7718-54-9
Water Solubility (as reported in the 2008/2009 EU Risk Assessment for nickel chloride): anhydrous: 642 g/l at 20°C 876 g/l at 100°C hexahydrate: 2540 g/l at 20°C 5990 g/l at 100°C
(Cited from the 2008/2009 EU Risk Assessment for nickel chloride)
The available literature on the aqueous solubility of inorganic
nickel compounds has been reviewed (Carlsen, 2001). In the solid form,
NiCl2 exists as the anhydrous or the hexahydrate salt. In
saturated solutions of NiCl2 the number of water molecules
attached to the salt will vary with the temperature (Carlsen, 2001).
The salt is very soluble in water a priori, it could have
been expected that the presence of different amounts of crystal water
might dramatically affect the solubility. However, in the case of nickel
chloride it appears that independently of the number of water molecules
attached as crystal water, the compound is readily soluble in water.
Maximilien states that NiCl2 is very soluble in water
and in all biological fluids. The solubility is given as 240 g/L as
nickel at (Maximilien, 1989) in excellent agreement with the above
figures (Carlsen, 2001).
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