Copper(II) arsenate

Copper(II) arsenate
Names
	IUPAC name Copper(II) arsenate
	Other names Copper arsenate
Identifiers
CAS Number	7778-41-8 ;
3D model (JSmol)	Interactive image;
ChemSpider	24279 ;
PubChem CID	26065;
UNII	EV78GZO3YS ;
CompTox Dashboard (EPA)	DTXSID30894196 ;
	InChI InChI=1S/2AsH3O4.3Cu/c22-1(3,4)5;;;/h2(H3,2,3,4,5);;;/q;;3+2/p-6 Key: RKYSWCFUYJGIQA-UHFFFAOYSA-H ; InChI=1/2AsH3O4.3Cu/c22-1(3,4)5;;;/h2(H3,2,3,4,5);;;/q;;3+2/p-6 Key: RKYSWCFUYJGIQA-CYFPFDDLAM;
	SMILES [Cu+2].[Cu+2].[Cu+2].[O-][As]([O-])(=O)[O-].[O-][As]([O-])([O-])=O;
Properties
Chemical formula	Cu3(AsO4)2
Molar mass	468.48 g/mol
Appearance	blue or bluish green powder
Density	5.2 g/cm3
Melting point	1,100 °C (2,010 °F; 1,370 K)
Solubility in water	insoluble
Solubility product (Ksp)	7.95×10−36
Solubility	soluble in ammonia, dilute acids
Hazards
	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). verify (what is ?) Infobox references

Copper arsenate (Cu₃(AsO₄)₂·4H₂O, or Cu₅H₂(AsO₄)₄·2H₂O), also called copper orthoarsenate, tricopper arsenate, cupric arsenate, or tricopper orthoarsenate, is a blue or bluish-green powder insoluble in water and alcohol and soluble in aqueous ammonium and dilute acids. Its CAS number is 7778-41-8 or 10103-61-4.

^ John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99 ed.). CRC Press. pp. 5–188. ISBN 978-1138561632.
^ ^a ^b ^c NIOSH Pocket Guide to Chemical Hazards. "#0150". National Institute for Occupational Safety and Health (NIOSH).

[crc-1] John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99 ed.). CRC Press. pp. 5–188. ISBN 978-1138561632.

[PGCH-2] NIOSH Pocket Guide to Chemical Hazards. "#0150". National Institute for Occupational Safety and Health (NIOSH).

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