Melting point :138-143 °C (lit.)
Boiling point :267 °C (lit.)
Density :1.135 g/cm3 (20℃)
vapor density :3.7 (vs air)
vapor pressure :1.08 mm Hg ( 100 °C)
refractive index :1.6339 (estimate)
Flash point :156 °C
storage temp. :Store below +30°C.
solubility :Soluble in alcohol, chloroform, ether and hot benzene.
form :Powder or Flakes
pka :4.17(at 25℃)
Colour Index :76060
color :White, gray, or purple to brown
PH Range :NonQ uorescence (3.1) to orange/yellow Q uorescence (4.4)
PH :9 (50g/l, H2O, 20℃)
Water Solubility :47 g/L (25 ºC)
Merck :14,7285
BRN :742029
Exposure limits :TLV-TWA 0.1 mg/m³ (ACGIH 1989); TWA skin 0.1 mg/m³ (MSHA and OSHA); IDLH 25 mg/m³ (NIOSH); carcinogenicity: Animal Inadequate Evidence (IARC). .
Stability :Stable, but oxidizes when exposed to air. Incompatible with oxidizing agents. Store under inert atmosphere.
Major Application :Nanoparticles, liquid crystal displays, chemical mechanical polishing, bottom antireflective coatings, electrochromic materials, inks, rubber, hair dyes, cosmetics, treatment of virus skin infection
InChIKey :CBCKQZAAMUWICA-UHFFFAOYSA-N
LogP :-0.84 at 20℃
CAS DataBase Reference :106-50-3(CAS DataBase Reference)
IARC :3 (Vol. 16, Sup 7) 1987
NIST Chemistry Reference :1,4-Benzenediamine(106-50-3)
EPA Substance Registry System :p-Phenylenediamine (106-50-3)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes 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 H370 Causes damage to organs Specific target organ toxicity, single exposure Category 1 Danger P260, P264, P270, P307+P311, P321,P405, P501 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:	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.