Melting point :100-102 °C
Boiling point :256-258 °C
Density :1,27 g/cm³
vapor density :3.7 (vs air)
vapor pressure :0.01 mm Hg ( 25 °C)
refractive index :1.6339 (estimate)
Flash point :110°C
storage temp. :2-8°C
solubility :H₂O: 1 tablet/10 mL, clear, colorless
form :tablet
Colour Index :76010
pka :4.46(at 25℃)
color :white to off-white
PH Range :Green Q uorescence (3.1) to nonQ uorescence (4.4)
PH :7-8 (50g/l, H2O, 20℃)
explosive limit :1.5%(V)
Water Solubility :<0.1 g/100 mL at 20 ºC
Sensitive :Air & Light Sensitive
Merck :14,7284
BRN :606074
Exposure limits :TLV-TWA 0.1 mg/m³; carcinogenicity: A2- Suspected Human Carcinogen (ACGIH 1989).
Stability :Stable. Incompatible with strong oxidizing agents.
Major Application :bottom antireflective coatings, semiconductor devices, hair dyes, detecting antibody, substrate for horseantibody, glucose, streptomycin, penicillin, sulfonamide, neuroglobin, substrate for horseradish peroxidase
LogP :0.12-0.17 at 20-25℃ and pH7-8
CAS DataBase Reference :95-54-5(CAS DataBase Reference)
IARC :2B (Vol. 123) 2020
NIST Chemistry Reference :1,2-Benzenediamine(95-54-5)
EPA Substance Registry System :1,2-Phenylenediamine (95-54-5)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, P501 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 H351 Suspected of causing cancer Carcinogenicity Category 2 Warning P201, P202, P281, P308+P313, 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:	P202 Do not handle until all safety precautions have been read and understood. 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. P302+P352 IF ON SKIN: wash with plenty of soap and water. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.