Survey of the thermodynamic properties of hydrazine

The thermodynamic properties of hydrazine in the region of the (T, p) plane covering solid, liquid, and vapor phases have been reviewed and collected for the purpose of validating theoretically derived thermodynamic models of this compound. The data span the time period since 1885 to today, and thei r characteristics of interest, such as source reliability, numerical accura cy, experimental nature, and so forth, are thoroughly discussed. Unavoidabl e mistakes, imprecisions, and misinformation that have crept in during the course of the years are pointed out; regions of the (T, p) plane where and properties for which the lack of data is particularly noticeable are approp riately identified.