Melting point :123-126 °C(lit.)
Boiling point :308.2°C (rough estimate)
Density :1,158 g/cm³
vapor pressure :2.6 x 10^-5 mmHg at 25 °C (Mabey et al., 1982)
refractive index :1.6266 (estimate)
storage temp. :Refrigerator
solubility :Soluble in ethanol (Weast, 1986).
pka :3.02±0.70(Predicted)
color :Colorless to pale yellow to orange crystals
Water Solubility :221 mg/L at 25 °C (U.S. EPA, 1980a)
BRN :639793
Stability :Stable. Incompatible with strong oxidizing agents, strong acids.
InChIKey :YBQZXXMEJHZYMB-UHFFFAOYSA-N
CAS DataBase Reference :122-66-7(CAS DataBase Reference)
NIST Chemistry Reference :Hydrazine, 1,2-diphenyl-(122-66-7)
EPA Substance Registry System :1,2-Diphenylhydrazine (122-66-7)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501 H350 May cause cancer Carcinogenicity Category 1A, 1B Danger H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:	P201 Obtain special instructions before use. P273 Avoid release to the environment. P308+P313 IF exposed or concerned: Get medical advice/attention.