Donovan's solution

Donovan's solution is an inorganic compound prepared from arsenic triiodide and mercuric iodide.[1] Despite its name, it is a compound and not a solution.

Donovan's Solution
Names
IUPAC name
Iodomercury; triiodoarsane
Other names
Liquor hydriodatis arsenici et hydrargyri
Identifiers
3D model (JSmol)
ChemSpider
RTECS number
  • CG3200000
UN number 1557
Properties
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
Yes
Hazards
Main hazards Toxic
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

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.[2]

Uses

Has been used in veterinary medicine to treat chronic diseases of the skin.[3] Also as a folk remedy.[4] Used during the 19th century to treat Lepra vulgaris[5] and psoriasis[6][7] in humans, taken internally.

gollark: I mean, yes, you *could* get a better one, but they could also be terrible and you couldn't do anything.
gollark: I don't see why you would expect monarchs, who have basically no checks on power, to do better than politicians, who at least are required to look good to some subset of the population.
gollark: (but doesn't lead directly to much faster computers because Dennard scaling is dead)
gollark: Intel isn't the only company making microprocessors ever, the trend apparently still holds.
gollark: Since most people handwave that kind of issue anyway, I assume the main practical issues are just ickiness-related.

References
  1. Budavari, Susan (1989). "3413. Donovan's Solution". The Merck Index (11th ed.). Merck & Co., Inc. p. 537. ISBN 091191028X. LCCN 89060001.
  2. Arnold James Cooley (1880). "Solution". In Richard Vine Tuson (ed.). A cyclopædia of practical receipts and ... information on the arts, manufactures, and trades. II (6th ed.). p. 1525.
  3. 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.
  4. "Donovan's solution". Chemical Dictionary Online. Retrieved 29 November 2013.
  5. Sir Erasmus Wilson (1847). "Treatment of Lepra". On Diseases of the Skin (2nd ed.). John Churchill. p. 271.
  6. 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.
  7. "Good Results of Donovan's Solution in Psoriasis". The Lancet. 70 (1770): 116. August 1857. doi:10.1016/S0140-6736(02)38789-0.
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