Gallium(III) sulfate

Gallium(III) sulfate
Names
	Other names Digallium trisulfate;
Identifiers
CAS Number	(anhydrous): 13494-91-2 (sulfates are wrong in CAS) ; (octadecahydrate): 13780-42-2;
3D model (JSmol)	(anhydrous): Interactive image; (monohydrate): Interactive image; (octadecahydrate): Interactive image;
ChemSpider	(anhydrous): 58307;
EC Number	(anhydrous): 236-816-0;
PubChem CID	(anhydrous): 64773; (monohydrate): 16213072; (hexahydrate): 129655091; (octadecahydrate): 91886266;
CompTox Dashboard (EPA)	(anhydrous): DTXSID40890705 ;
	InChI InChI=1S/2Ga.3H2O4S/c;;31-5(2,3)4/h;;3(H2,1,2,3,4)/q2+3;;;/p-6 Key: UXLRWZBQRAWBQA-UHFFFAOYSA-H; (octadecahydrate): InChI=1S/2Ga.3H2O4S.18H2O/c;;31-5(2,3)4;;;;;;;;;;;;;;;;;;/h;;3(H2,1,2,3,4);181H2/q2*+3;;;;;;;;;;;;;;;;;;;;;/p-6 Key: RBIKSELZKJNPFC-UHFFFAOYSA-H;
	SMILES (anhydrous): [O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Ga+3].[Ga+3]; (monohydrate): O.[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Ga+3].[Ga+3]; (octadecahydrate): O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Ga+3].[Ga+3];
Properties
Chemical formula	Ga2(SO4)3
Molar mass	445.7 g/mol
Appearance	White solid
Density	3.86 g/cm3
Melting point	680 °C (1,256 °F; 953 K) (decomposes)
Solubility in water	Slightly soluble
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P302+P352, P305+P351+P338
NFPA 704 (fire diamond)	0 0 1
Related compounds
Other cations	Aluminium sulfate, Indium(III) sulfate,
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Gallium(III) sulfate refers to the chemical compound, a salt, with the formula Ga₂(SO₄)₃, or its hydrates Ga₂(SO₄)₃·xH₂O. Gallium metal dissolves in sulfuric acid to form solutions containing [Ga(OH₂)₆]³⁺ and SO₄²⁻ ions. The octadecahydrate Ga₂(SO₄)₃·18H₂O crystallises from these solutions at room temperature. This hydrate loses water in stages when heated, forming the anhydrate Ga₂(SO₄)₃ above 150 °C and completely above 310 °C. Anhydrous Ga₂(SO₄)₃ is isostructural with iron(III) sulfate, crystallizing in the rhombohedral space group R3.

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