Nomenclature
CAS number: 10034-92-1
Hydrazine dihydriodide.
H
14I
2N
6; mol wt 351.96.
H 4.01%, I 72.11%, N 23.88%.
(N
2H
5+I
)
2.N
2H
4.
Description and references
Prepared from hydrazine (85-100%) and hydriodic
acid in ethanol at pH 8-9: Curtius, Schulz, J. Prakt. Chem. 42, 540 (1890); Gilbert, Decius, J. Am. Chem. Soc. 80, 3871 (1958).
Properties
Large, white, biaxial needles from abs ethanol, mp 90-92°. Crystals
stored in a glass-stoppered bottle at room temp showed no deterioration
over a six month period. Freely sol in water with formation of hydrazine
monoiodide and hydriodic acid. The hydrazine is very strongly held
in the dry crystals. Exposure in a vacuum still at 25 microns and
room temperature for 5 hours showed no loss in weight. The neutral
hydrazine molecule is probably hydrogen-bonded to the N2H5+ ions.Status
This monograph has been retired and is no longer subject
to revision or update.