| IUPAC name
|3D model (Jmol)|| Interactive image|
|Molar mass||90.09 g/mol|
|Melting point||153 to 154 °C (307 to 309 °F; 426 to 427 K)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|(what is ?)|
Carbohydrazide is the chemical compound with the formula OC(N2H3)2. It is a white, water-soluble solid. It decomposes upon melting. A number of carbazides are known where one or more N-H groups are replaced by other substituents. They occur widely in the drugs, herbicides, plant growth regulators, and dyestuffs.
- OC(NH2)2 + 2 N2H4 → OC(N2H3)2 + 2 NH3
It can also be prepared by reactions of other C1-precursors with hydrazine, such as carbonate esters. It can be prepared from phosgene, but this route cogenerates the hydrazinium salt [N2H5]Cl and results in some diformylation. Carbazic acid is also a suitable precursor:
- N2NH3CO2H + N2H4 → OC(N2H3)2 + H2O
- Oxygen scrubber: carbohydrazide is used to remove oxygen in boiler systems. Oxygen scrubbers prevent corrosion.
- Precursor to polymers: carbohydrazide can be used as a curing agent for epoxide-type resins.
- Photography: carbohyrazide is used in the silver halide diffusion process as one of the toners. Carbohydrazide is used to stabilize color developers that produce images of the azo-methine and azine classes.
- Carbohydrazide has been used to develop ammunition propellants, stabilize soaps, and used a reagent in organic synthesis.
- Inorganic Syntheses Volume IV. McGraw-Hill Book Company, Inc. 1953. p. 35.
- Kurzer, Frederick; Michael Wilkinson (February 1970). "Chemistry of carbohydrazide and thiocarbohydrazide". Chemical Reviews. doi:10.1021/cr60263a004.
- Jean-Pierre Schirmann, Paul Bourdauducq "Hydrazine" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2002. doi:10.1002/14356007.a13_177.
- Ottersen, T.; Hope, H. "The Structure and Electron Deformation Density Distribution of Carbonohydrazide (Carbohydrazide) at 85 K" Acta Crystallographica B 1979, volume 35, p373-p378. doi:10.1107/S0567740879003575
- Buecker, Brad (1997). Power Plant Water Chemistry A Practical Guide. PennWell Publishing Company. pp. 13–16. ISBN 0-87814-619-9.
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