Copper(II) selenite

Copper(II) selenite
Names
	IUPAC name Copper(II) selenite
	Other names Copper selenite dihydrate
Identifiers
CAS Number	10214-40-1 ; 15168-20-4 (dihydrate) ;
3D model (JSmol)	Interactive image;
ChemSpider	21241696 dihydrate;
ECHA InfoCard	100.030.465
EC Number	233-526-6;
PubChem CID	160923 anhydrous; 71317452 monohydrate; 24884280 dihydrate;
UNII	G2Y4101Z3O ; B084V60QBP (dihydrate) ;
CompTox Dashboard (EPA)	DTXSID20907163 ;
	InChI InChI=1S/Cu.H2O3Se/c;1-4(2)3/h;(H2,1,2,3)/q+2;/p-2 Key: JNRBLFVQPTZFAG-UHFFFAOYSA-L;
	SMILES [O-][Se](=O)[O-].[Cu+2];
Properties
Appearance	Blue[1]
Solubility	Insoluble in water[1]; Slightly soluble in benzene and acids[1]
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H331, H371, H410
Precautionary statements	P260, P261, P264, P270, P271, P273, P301+P310, P304+P340, P311, P314, P321, P330, P391, P403+P233, P405, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Copper(II) selenite is an inorganic salt frequently found as its dihydrate, CuSeO₃·2H₂O, in the form of a blue powder.[2][3]

Preparation

Copper(II) selenite can be prepared from copper(II) acetate and selenous acid.[2][4]

Copper(II) selenite can be used a catalyst for Kjeldahl digestion.[2]

"Copper(II) selenite". Sigma-Aldrich.
"Copper Selenite as a catalyst in the Kjeldahl nitrogen determination". Department of Chemistry, University of Wisconsin, Madison. November 1935.
"Sigma Aldrich - Copper(II) selenite dihydrate".
Hurd, Loren C.; Kemmerer, George I.; Meloche, V. W. (2002-05-01). "The Ammonates of Copper Selenite1". Journal of the American Chemical Society. 52 (10): 3881–3886. doi:10.1021/ja01373a018.

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