Melting point :18-21 °C (lit.)
Boiling point :238-241 °C (lit.)
Density :1.098 g/mL at 25 °C (lit.)
vapor density :4.3 (vs air)
vapor pressure :<0.1 mm Hg ( 20 °C)
refractive index :n20/D 1.607(lit.)
Flash point :192 °F
storage temp. :Store below +30°C.
solubility :Soluble in dilute acids.
form :Powder
pka :8.79(at 15℃)
color :White to slightly blue or light beige
explosive limit :1.1%(V)
Water Solubility :145 g/L (20 ºC)
Sensitive :Air & Light Sensitive
Merck :14,7293
BRN :606080
Exposure limits :TLV-TWA skin 0.1 ppm (0.44 mg/m³) (ACGIH), 5 ppm (22 mg/m³) (OSHA); STEL 10 ppm (44 mg/m³) (OSHA); carcinogenicity: A2-Suspected Human Carcinogen (ACGIH), Carcinogen (NIOSH). .
Dielectric constant :7.2（23℃）
Stability :Stable, but may decompose in sunlight. May be air or light sensitive. Incompatible with strong oxidizing agents, metal oxides.
CAS DataBase Reference :100-63-0(CAS DataBase Reference)
NIST Chemistry Reference :Hydrazine, phenyl-(100-63-0)
EPA Substance Registry System :Phenylhydrazine (100-63-0)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362 H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501 H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P H341 Suspected of causing genetic defects Germ cell mutagenicity Category 2 Warning P201,P202, P281, P308+P313, P405,P501 H350 May cause cancer Carcinogenicity Category 1A, 1B Danger H372 Causes damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 1 Danger P260, P264, P270, P314, P501 H400 Very toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 1 Warning P273, P391, P501
Precautionary statements:	P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.