Calcium arsenate

Calcium arsenate
Names
	IUPAC name Calcium arsorate
	Other names Calcium orthoarsenate; Cucumber dust; Tricalcium arsenate; Tricalcium ortho-arsenate
Identifiers
CAS Number	7778-44-1 ;
3D model (JSmol)	Interactive image;
ChemSpider	22909 ;
ECHA InfoCard	100.029.003
EC Number	233-287-8;
KEGG	C18647 ;
PubChem CID	24501;
RTECS number	CG0830000;
UNII	95OX15I8ZU ;
CompTox Dashboard (EPA)	DTXSID6058182 ;
	InChI InChI=1S/2AsH3O4.3Ca/c22-1(3,4)5;;;/h2(H3,2,3,4,5);;;/q;;3+2/p-6 Key: RMBBSOLAGVEUSI-UHFFFAOYSA-H ; InChI=1/2AsH3O4.3Ca/c22-1(3,4)5;;;/h2(H3,2,3,4,5);;;/q;;3+2/p-6 Key: RMBBSOLAGVEUSI-CYFPFDDLAC;
	SMILES [O-][As](=O)([O-])[O-].[O-][As](=O)([O-])[O-].[Ca+2].[Ca+2].[Ca+2];
Properties
Chemical formula	Ca3(AsO4)2
Molar mass	398.072 g/mol
Appearance	white powder
Odor	odorless
Density	3.62 g/cm3, solid
Melting point	1,455 °C (2,651 °F; 1,728 K) (decomposes)
Solubility in water	0.013 g/100 mL (25 °C)
Solubility in Organic solvents	insoluble
Solubility in acids	soluble
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	carcinogen
NFPA 704 (fire diamond)	4 0 0
Flash point	noncombustible
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	20 mg/kg (rat, oral); 82 mg/kg (rat, oral); 74 mg/kg (mouse, oral); 50 mg/kg (rabbit, oral); 38 mg/kg (dog, oral)
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 0.010 mg/m3
REL (Recommended)	Ca C 0.002 mg/m3 [15-minute]
IDLH (Immediate danger)	5 mg/m3 (as As)
	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

Calcium arsenate is the inorganic compound with the formula Ca₃(AsO₄)₂. A colourless salt, it was originally used as a pesticide and as a germicide. It is highly soluble in water, in contrast to lead arsenate, which makes it more toxic. Two minerals are hydrates of calcium arsenate: rauenthalite Ca₃(AsO₄)₂·10H₂O and phaunouxite Ca₃(AsO₄)₂·11H₂O. A related mineral is ferrarisite (Ca₅H₂(AsO₄)₄·9H₂O.

Names


IUPAC name Calcium arsorate
Other names Calcium orthoarsenate Cucumber dust Tricalcium arsenate Tricalcium ortho-arsenate
Identifiers
CAS Number	7778-44-1^Y
3D model (JSmol)	Interactive image
ChemSpider	22909^N
ECHA InfoCard	100.029.003
EC Number	233-287-8
KEGG	C18647^Y
PubChem CID	24501
RTECS number	CG0830000
UNII	95OX15I8ZU^Y
CompTox Dashboard (EPA)	DTXSID6058182
InChI InChI=1S/2AsH3O4.3Ca/c22-1(3,4)5;;;/h2(H3,2,3,4,5);;;/q;;3+2/p-6^N Key: RMBBSOLAGVEUSI-UHFFFAOYSA-H^N InChI=1/2AsH3O4.3Ca/c22-1(3,4)5;;;/h2(H3,2,3,4,5);;;/q;;3+2/p-6 Key: RMBBSOLAGVEUSI-CYFPFDDLAC
SMILES [O-][As](=O)([O-])[O-].[O-][As](=O)([O-])[O-].[Ca+2].[Ca+2].[Ca+2]
Properties
Chemical formula	Ca₃(AsO₄)₂
Molar mass	398.072 g/mol
Appearance	white powder
Odor	odorless
Density	3.62 g/cm³, solid
Melting point	1,455 °C (2,651 °F; 1,728 K) (decomposes)
Solubility in water	0.013 g/100 mL (25 °C)
Solubility in Organic solvents	insoluble
Solubility in acids	soluble
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	carcinogen
NFPA 704 (fire diamond)	4 0 0
Flash point	noncombustible
Lethal dose or concentration (LD, LC):
LD₅₀ (median dose)	20 mg/kg (rat, oral) 82 mg/kg (rat, oral) 74 mg/kg (mouse, oral) 50 mg/kg (rabbit, oral) 38 mg/kg (dog, oral)
NIOSH (US health exposure limits):
PEL (Permissible)	TWA 0.010 mg/m³
REL (Recommended)	Ca C 0.002 mg/m³ [15-minute]
IDLH (Immediate danger)	5 mg/m³ (as As)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is ^YN ?) Infobox references