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Donovan's Solution
Names
IUPAC name Iodomercury; triiodoarsane
Other names Liquor hydriodatis arsenici et hydrargyri
Identifiers
CAS Number	8012-54-2
3D model (JSmol)	Interactive image
ChemSpider	23077
PubChem CID	24679
RTECS number	CG3200000
UN number	1557
CompTox Dashboard (EPA)	DTXSID00230082
InChI InChI=1S/AsI3.Hg.HI/c2-1(3)4;;/h;;1H/q;+1;/p-1Key: QLULWSBMTZWVDE-UHFFFAOYSA-M
SMILES (I)(I)I.I
Properties
Chemical formula	AsHgI₄
Molar mass	783.12948
Appearance	Clear, colourless, or pale yellow. Darkens with age.
Boiling point	403 °C (757 °F; 676 K) at 760 mmHg
Solubility in water	Yes
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Toxic
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references

Chemical compound

Donovan's solution is an inorganic compound prepared from arsenic triiodide and mercuric iodide. Despite its name, it is a compound and not a solution.

Method

Donovan's solution can be prepared by mixing arsenic triiodide, mercuric iodide, and sodium bicarbonate in aqueous solution.

Cooley's cyclopædia of practical receipts and ... information on the arts, manufactures, and trades gives a more complex method.

Uses

The solution been used in veterinary medicine to treat chronic diseases of the skin and as a folk remedy. It was used during the 19th century to treat lepra vulgaris and psoriasis in humans, taken internally.

References

Budavari, Susan (1989). "3413. Donovan's Solution". The Merck Index (11th ed.). Merck & Co., Inc. p. 537. ISBN 091191028X. LCCN 89060001.
Navy Department. Bureau of Medicine and Surgery (1950). Pharmacy and Materia Medica: Military-medical Operations Courses. Bureau of Naval Personnel. p. 17.
^ Oxtoby, David W.; H.P. Gillis; Allan Campion (2012). Principles of modern chemistry (7th ed.). Belmont, Calif.: Brooks/Cole Cengage Learning. p. 513. ISBN 978-0840049315.
Arnold James Cooley (1880). "Solution". In Richard Vine Tuson (ed.). A cyclopædia of practical receipts and ... information on the arts, manufactures, and trades. Vol. II (6th ed.). p. 1525.
"Donovan's solution". Chemical Dictionary Online. Retrieved 29 November 2013.
Sir Erasmus Wilson (1847). "Treatment of Lepra". On Diseases of the Skin (2nd ed.). John Churchill. p. 271.
Henry G. Piffard (1881). "Psoriasis Treatment. Part 6". A Treatise On The Materia Medica And Therapeutics Of The Skin. Sampson, Low, Marston, Searle & Rivington. p. 254.
"Good Results of Donovan's Solution in Psoriasis". The Lancet. 70 (1770): 116. August 1857. doi:10.1016/S0140-6736(02)38789-0.

v t e Arsenic compounds
Arsenides	AlAs BAs BiAs Cd₃As₂ CaAs CoAs DyAs HoAs GaAs InAs YAs LiAs MoAs₂ MnAs NpAs NpAs₂ PdAs₂ PrAs PuAs SmAs Na₃As TaAs WAs₂ YAs Zn₃As₂
As(III)	AsBr₃ AsCl₃ AsCl₅ AsF₃ AsH₃ AsI₃ As₂O₃ As₂S₃ As₂Se₃ As₄S₄ AsP
As(III,V)	As₂O₄
As(V)	AsF₅ AsCl₅ As₂O₅ As₂S₅

v t e Iodine compounds
Iodine(−I)	HI NiI2−4 AtI other
Iodine(I)	I₂O HIO IN₃ ICN ICl IF NI₃ IBr INO₃ C₃H₅I
Iodine(II)	IO
Iodine(III)	HIO₂ ICl₃ IF₃ IBr₃ I₂(SO₄)₃
Iodine(IV)	IO ₂
Iodine(V)	HIO₃ IF₅ I₂O₅ IO₂F IOF₃
Iodine(VII)	HIO₄ H₅IO₆ IF₇ IO₃F IO₂F₃ IOF₅

Mercury compounds

Mercury(I)

Mercury(II)

Organomercury compounds	Hg(CH₃)₂ Hg(C₂H₅)₂ Hg(C₆H₅)₂ HgC₆H₅CH₃CO₂ HgC₆H₅OB(OH)₂ HgC₆H₅NO₃ HgC₆H₅CCl₃ HgClC₆H₄CO₂H HgOHCH₂CHOCH₃CH₂(NHCO) C ₃₆H ₇₀HgO ₄ HgOHCH₂CHOCH₃CH₂NHCOC₆H₄OCH₂CO₂H Na₂HgOHC₆HOBrC₆H₂OBrOCHC₆H₄CO₂ HgOC₆H₂CH₃NO₂ NaHgC₂H₅SC₆H₄CO₂

Mercury(IV)

HgF₄ (hypothetical)

Amalgams

Mercury cations

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