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Bismuth(III) sulfate
Names
	Systematic IUPAC name Dibismuth trisulfate
	Other names Bismuth trisulfate;
Identifiers
CAS Number	7787-68-0;
3D model (JSmol)	Interactive image;
ChemSpider	171500;
ECHA InfoCard	100.029.208
EC Number	232-129-5;
PubChem CID	198144;
UNII	68FE11533K;
CompTox Dashboard (EPA)	DTXSID10188121 ;
	InChI InChI=1S/2Bi.3H2O4S/c;;31-5(2,3)4/h;;3(H2,1,2,3,4)/q2*+3;;;/p-6 Key: BEQZMQXCOWIHRY-UHFFFAOYSA-H;
	SMILES [O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[O-]S(=O)(=O)[O-].[Bi+3].[Bi+3];
Properties
Chemical formula	Bi2(SO4)3
Molar mass	706.15 g/mol
Appearance	White solid
Density	5.31 g/cm3
Melting point	465 °C (869 °F; 738 K) (decomposes)
Solubility in water	Hydrolysis
Structure
Crystal structure	monoclinic
Space group	P21/n
Lattice constant	a = 13.08 Å, b = 4.73 Å, c = 14.52 Å α = 90°, β = 100.9°, γ = 90°
Formula units (Z)	4
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, P501
NFPA 704 (fire diamond)	0 0 0
Related compounds
Other anions	Bismuth(III) nitrate
Other cations	Antimony(III) sulfate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Bismuth(III) sulfate is an inorganic chemical compound of bismuth with the formula Bi₂(SO₄)₃. It is a hygroscopic white solid that decomposes at 465 °C to bismuth(III) oxysulfate and is isotypic to antimony(III) sulfate.^[1]

Production

Bismuth(III) sulfate is most commonly produced from the reaction of bismuth(III) nitrate and sulfuric acid:

2 Bi(NO₃)₃ + 3 H₂SO₄ → Bi₂(SO₄)₃ + 6 HNO₃

Another polymorph of bismuth(III) sulfate can be produced by the treatment of lithium bismuthate(III) with sulfuric acid.^[3]

Properties

Bismuth(III) sulfate decomposes at 465 °C to Bi₂O(SO₄)₂. If continually heated, it decomposes to various bismuth oxysulfates and at 950 °C it decomposes to bismuth(III) oxide. Bismuth(III) sulfate hydrolyzes in water.^[1]^[2]

References

^ ^a ^b ^c ^d Matthias Hämmer; Jakoah Brgoch; Philip Netzsch; Henning A. Höppe (2022). "The Role of the Bi³⁺ Lone Pair Effect in Bi(H₃O)(SO₄)₂, Bi(HSO₄)₃, and Bi₂(SO₄)₃". Inorganic Chemistry. 61 (9): 4102–4113. doi:10.1021/acs.inorgchem.1c03893. PMID 35192329. S2CID 247057309.
^ ^a ^b Ryoko Matsuzaki; Atsuko Sofue; Hagio Masumizu; Yuzo Saeki (1974). "THERMAL DECOMPOSITION PROCESS OF Bi₂(SO₄)₃". Chemistry Letters. 3 (7): 737–740. doi:10.1246/cl.1974.737.
^ Chinmayee V. Subban; Gwenaëlle Rousse; Matthieu Courty; Philippe Barboux; Jean-Marie Tarascon (2014). "Polymorphism in Bi₂(SO₄)₃". Solid State Sciences. 38: 25–29. Bibcode:2014SSSci..38...25S. doi:10.1016/j.solidstatesciences.2014.09.008.