Nickel chromate

Nickel chromate
IUPAC name Nickel(II) chromate
Other names nickelous chromate nickel chromate nickel(II) chromium(VI) oxide
Properties
Molecular formula	NiCrO4
Molar mass	174.71 g/mol
Appearance	rust colored powder
Solubility in water	insoluble in water
Solubility	soluble in hydrochloric acid
Hazards
Flash point	Non-flammable
Related compounds
Other anions	nickel(II) oxide nickel(II) hydroxide nickel(II) sulfate nickel(II) chloride
Other cations	sodium chromate potassium chromate zinc chromate
Y chromate (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Nickel chromate solution in hydrochloric acid

Nickel chromate (NiCrO₄) is a reddish brown, or rust-coloured compound. It is basic and has a high melting point. It is insoluble in water but highly soluble in Hydrochloric acid, forming a yellow solution.

This compound contains nickel in its +2 oxidation state. It is toxic due to the toxicity of the chromate and the nickel ions, though since it is insoluble the toxicity from both sources are diminished.

It may be formed in the lab by reaction a mixture of chromium(III) and nickel(II) chlorides with sodium hypochlorite:

2 NiCl₂ + 2 CrCl₃ + 10 NaOH + 3 NaClO → 2 NiCrO₄ + 10 NaCl + 5 H₂O