Structure of Carbazole (CAS NO.86-74-8):

IUPAC Name: 9H-carbazole 
Empirical Formula: C₁₂H₉N
Molecular Weight: 167.2066 
EINECS: 201-696-0 
Index of Refraction: 1.767
Molar Refractivity: 56.37 cm³
Molar Volume: 135.9 cm³
Polarizability: 22.34×10^-24cm³
Surface Tension: 57.5 dyne/cm
Density: 1.229 g/cm³
Flash Point: 160 °C
Enthalpy of Vaporization: 57.64 kJ/mol 
Melting Point: 243-246 °C(lit.)
Boiling Point: 355 °C at 760 mmHg
Vapour Pressure: 6.6E-05 mmHg at 25°C 
Water Solubility: <0.1 g/100 mL at 19 ºC 
Stability: Stable. Combustible. Incompatible with strong oxidizing agents, nitrogen oxides, potassium hydroxide. 
Product Categories: Intermediates of Dyes and Pigments;Organics;Carbazoles;Carbazoles (for Conduting Polymer Research);Functional Materials;Reagents for Conducting Polymer Research;Alpha Sort;C;CA - CGEnvironmental Standards;CAlphabetic;PAHs;Volatiles/ Semivolatiles;CA - CG;Pesticides&Metabolites;Stains and Dyes;Stains&Dyes, A to;CA - CGAntibiotics;Alphabetic;Chemical Structure;Others

 Carbazole (CAS NO.86-74-8) are used as intermediates for dye, plastic and pesticide.

IARC Cancer Review: Group 3 IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 7 , 1987,p. 56.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Limited Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 32 , 1983,p. 239.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) . Reported in EPA TSCA Inventory.

Hazard Codes: Xn,N,T
Risk Statements: 22-36/37/38-40-50/53-63-43-23/24/25-45 
R22:Harmful if swallowed. 
R36/37/38:Irritating to eyes, respiratory system and skin. 
R40:Limited evidence of a carcinogenic effect. 
R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. 
R63:Possible risk of harm to the unborn child. 
R43:May cause sensitization by skin contact. 
R23/24/25:Toxic by inhalation, in contact with skin and if swallowed. 
R45:May cause cancer.
Safety Statements: 26-36-60-61-36/37-24/25-23-53-45 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing. 
S60:This material and its container must be disposed of as hazardous waste. 
S61:Avoid release to the environment. Refer to special instructions / safety data sheets. 
S36/37:Wear suitable protective clothing and gloves. 
S24/25:Avoid contact with skin and eyes. 
S23:Do not breathe vapour. 
S53:Avoid exposure - obtain special instructions before use. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
RIDADR: UN 2811 6.1/PG 3
WGK Germany: 2
RTECS: FE3150000
F: 10
Hazard Note: Harmful
HazardClass: 9
PackingGroup: III
HS Code: 29339990
Poison by intraperitoneal route. Questionable carcinogen. Moderately toxic by ingestion. Mutation data reported. A pesticide. When heated to decomposition it emits toxic fumes of NO_x.

  Carbazole , its cas register number is 86-74-8. It also can be called 9-Azafluorene ; 9H-Carbazole ; Dibenzo(b,d)pyrrole ;
 Dibenzopyrrole ; Diphenyleneimine ; Diphenylenimide ; Diphenylenimine .