Copper(I) sulfate

Copper(I) sulfate
Names
	IUPAC name Copper(I) sulfate
	Systematic IUPAC name Copper(I) sulfate
	Other names Copper sulfate; Cuprous sulfate; Dicopper sulfate;
Identifiers
CAS Number	17599-81-4;
3D model (JSmol)	Interactive image;
ChemSpider	118749;
ECHA InfoCard	100.159.746
PubChem CID	134737;
CompTox Dashboard (EPA)	DTXSID30889663 ;
	InChI InChI=1S/2Cu.H2O4S/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2+1;/p-2 Key: WIVXEZIMDUGYRW-UHFFFAOYSA-L; InChI=1/2Cu.H2O4S/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2+1;/p-2 Key: WIVXEZIMDUGYRW-NUQVWONBAI;
	SMILES [O-]S(=O)(=O)[O-].[Cu+].[Cu+];
Properties
Chemical formula	Cu2SO4
Molar mass	223.15 g mol−1
Appearance	White
Density	4.12 g cm−3
Melting point	110 °C
Solubility in water	decomposes
Structure
Crystal structure	orthorhombic
Space group	Fddd
Lattice constant	a = 4.748(3) Å, b = 13.96(1) Å, c = 10.86(1) Å
Formula units (Z)	8
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H315, H319, H400
Precautionary statements	P264, P264+P265, P270, P273, P280, P301+P317, P302+P352, P305+P351+P338, P321, P330, P332+P317, P337+P317, P362+P364, P391, P501
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 1 mg/m3 (as Cu)
REL (Recommended)	TWA 1 mg/m3 (as Cu)
IDLH (Immediate danger)	TWA 100 mg/m3 (as Cu)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Copper(I) sulfate, also known as cuprous sulfate, is an inorganic compound with the chemical formula Cu₂ SO₄. It is a white solid, in contrast to copper(II) sulfate, which is blue in hydrous form. Compared to the commonly available reagent, copper(II) sulfate, copper(I) sulfate is unstable and not readily available.