Cacodyl oxide

Cacodyl oxide is a chemical compound of the formula [(CH₃)₂As]₂O. This organoarsenic compound is primarily of historical significance since it is sometimes considered to be the first organometallic compound synthesized in relatively pure form.[1][2]

Cacodyl oxide

Names
IUPAC name Dimethylarsinous anhydride
Identifiers
CAS Number	503-80-0
3D model (JSmol)	Interactive image
ChemSpider	10002
PubChem CID	10431
CompTox Dashboard (EPA)	DTXSID70198307
InChI InChI=1S/C4H12As2O/c1-5(2)7-6(3)4/h1-4H3 Key: LOKPKYSOCCPWIZ-UHFFFAOYSA-N InChI=1/C4H12As2O/c1-5(2)7-6(3)4/h1-4H3 Key: LOKPKYSOCCPWIZ-UHFFFAOYAL
SMILES C[As](C)O[As](C)C
Properties
Chemical formula	C4H12As2O
Molar mass	255.98 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

"Cadet's fuming liquid", which is composed of cacodyl and cacodyl oxide, was originally synthesized by heating potassium acetate with arsenic trioxide. It has a disagreeable odor and is toxic. It has been used as a denaturing and warning agent.

See also

• Arsenic
• Arsine
• Cacodylic acid
• Lewisite

References

1. Elschenbroich, C. (2006). Organometallics. Weinheim: Wiley-VCH. ISBN 9783527293902.
2. Seyferth, D. (2001). "Cadet's Fuming Arsenical Liquid and the Cacodyl Compounds of Bunsen". Organometallics. 20 (8): 1488–1498. doi:10.1021/om0101947.