Title: Carbohydrazide
CAS Registry Number: 497-18-7
CAS Name: Carbonic dihydrazide
Additional Names: 1,3-diaminourea
Molecular Formula: CH6N4O
Molecular Weight: 90.08
Percent Composition: C 13.33%, H 6.71%, N 62.20%, O 17.76%
Line Formula: NH2NHCONHNH2
Literature References: Prepd by refluxing diethyl carbonate with hydrazine hydrate: Mohr et al., Inorg. Synth. 4, 32 (1953).
Properties: Crystals from water + ethanol, dec 153-154°. Freely sol in water. pH of 1% aq soln ~7.4. Practically insol in alcohol, ether, chloroform, benzene. Forms salts with acids. With nitrous acid it forms the highly explosive carbonyl azide CO(N3)2.
Carbomycin Carbon Diselenide Carbon Disulfide Carbon Monoxide Carbon Nitride

Structural formula
Ball-and-stick model
CAS number 497-18-7 YesY
PubChem 73948
ChemSpider 66578 YesY
ChEBI CHEBI:61308 YesY
Jmol-3D images Image 1
Image 2
Molecular formula CH6N4O
Molar mass 90.09 g/mol
Density 1.341 g/cm3
Melting point 153 to 154 °C; 307 to 309 °F; 426 to 427 K
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Carbohydrazide is used as an oxygen scavenger in water treatment for boilers. It is an alternative to the hazardous and potentially carcinogenic hydrazine. Carbohydrazide reacts with oxygen to make water, nitrogen and urea. It also passivates metals and reduces metal oxides converting ferric oxide to ferrous oxide and converting cupric oxide to cuprous oxide.

It is widely used in the production of drugs, herbicides, plant growth regulators, and dyestuffs.