Donovan's solution

Donovan's Solution

Names
IUPAC name iodomercury; triiodoarsane
Other names liquor hydriodatis arsenici et hydrargyri
Identifiers
CAS Number	8012-54-2
ChemSpider	29291736 Y
Jmol 3D model	Interactive image
PubChem	24679
RTECS number	CG3200000
UN number	1557
InChI InChI=1S/AsI3.Hg.HI/c2-1(3)4;;/h;;1H/q;+1;/p-1 Key: QLULWSBMTZWVDE-UHFFFAOYSA-M
SMILES [As](I)(I)I.I[Hg]
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
Vapor pressure	{{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Donovan's solution is an inorganic compound prepared from arsenic triiodide and mercuric iodine.

Method

1g each of AsI₃ and HgI₂ with 0.9 sodium bicarbonate in water to make 100 ml.

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

Uses

Has been used in veterinary medicine to treat chronic diseases of the skin. Also as a folk remedy. Used during the 19th century to treat Lepra vulgaris and psoriasis in humans, taken internally.