Dihydrazinium oxalate

Hydrazine Oxalates - Hydrazinium Hydrogen Oxalate (N2H5HC2O4) and Dihydrazinium Oxalate [(N2H5)2C204]... 

Hydrazine forms two compounds with oxalic acid, hydrazinium (1+) hydrogen oxalate, N2H5HC2O4, and dihydrazinium (l-h) oxalate, (N2H5)2C204. Dihydrazinium oxalate has not been studied extensively as compared to hydrazinium hydrogen oxalate. 

Dihydrazinium oxalate is prepared by reacting hydrazine hydrate with ammonium oxalate and the reaction can be written as follows ... 

The available thermal data on dihydrazinium oxalate indicates that it melts at 148 °C and this melting is followed by another endotherm at 170 °C and an exothermic peak at 263 °C (Figure 2.15). The intermediate formed at 263 °C further decomposes exothermically at 494 °C. 

Gajapathy, D., Govindarajan, S., and Patil, K.C. (1983) Thermal decomposition of hydrazinium hydrogen oxalate and dihydrazinium oxalate. Thermochimica Acta, 60, 87-92. 

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