IUPAC Name: 1,2,3,4-Tetrachloro-5-(3,4-dichlorophenyl)benzene 
Molecular Formula: C₁₂H₄Cl₆
Transport information: UN 1208 3/PG 2
Molecular Weight: 360.86
Density: 1.593 g/cm³
Boiling Point: 417.1 °C at 760 mmHg
Flash Point: 208.7 °C
Freely Rotating Bonds: 1
Polar Surface Area: 0 Å²
Index of Refraction: 1.626
Molar Refractivity: 80.21 cm³
Molar Volume: 226.4 cm³
Polarizability: 31.79 ×10^-24 cm³
Surface Tension: 47.9 dyne/cm
Enthalpy of Vaporization: 64.44 kJ/mol
Vapour Pressure: 8.8E-07 mmHg at 25°C 
Storage temperature: 2-8°C
The Cas Register Number  of 2,3,3′,4,4′,5-Hexachlorobiphenyl is 38380-08-4.The chemical synonyms of  2,3,3′,4,4′,5-Hexachlorobiphenyl (CAS NO.38380-08-4) are 1,1'-biphenyl, 2,3,3',4,4',5-hexachloro- ;  2,3,3',4,4',5-hexachlorobiphenyl  ; 2,3,3',4,4',5-PCB ; 2,3,3',4,4',5-Hexachloro-1,1'-biphenyl ; 2,3,4,5,3',4'-Hexachlorobiphenyl ; 2,3,4,5,3',4'-Hexachloro-biphenyl ; 3,4,2',3',4',5'-Hexachlorobiphenyl ; 38380-08-4 [RN] ; Biphenyl, 2,3,3prime,4,4prime,5-hexachloro-  .The molecular structure of 2,3,3′,4,4′,5-Hexachlorobiphenyl (CAS NO.38380-08-4) is .

It can be used in organic synthesis.

Experimental reproductive effects. When heated to decomposition it emits toxic vapors of Cl⁻.
Hazard Codes: F,Xn,N
Risk Statements: 11-38-48/22-51/53-62-65 
R11: Highly flammable. 
R38: Irritating to skin. 
R48/22: Harmful: danger of serious damage to health by prolonged exposure if swallowed. 
R51/53: Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. 
R62: Risk of impaired fertility. 
R65: Harmful: may cause lung damage if swallowed.
Safety Statements: 9-16-29-33-36/37-61-62 
S9: Keep container in a well-ventilated place. 
S16: Keep away from sources of ignition. 
S29: Do not empty into drains. 
S33: Take precautionary measures against static discharges.
S36/37: Wear suitable protective clothing and gloves.  
R61: May cause harm to the unborn child. 
R62: Risk of impaired fertility.

The model chemicals, benzo[a]pyrene (BaP, 2.5 mg kg-1), 2,3,3′,4,4′,5-Hexachlorobiphenyl (CAS NO.38380-08-4)(PCB-156, 2.5 mg kg-1), and cadmium (cadmium, 1 mg kg-1), were administered to fish by subcutaneous injections. Biomarker responses were quantified both following administration of single chemicals and sequential combinations of the chemicals in pairs. Significant induction of CYP1A protein levels and corresponding ethoxyresorufin-O-deethylase (EROD) activities was observed in BaP and PCB treated flounder after 2 and 8 days, respectively. The strongest induction (44 fold) was caused by BaP. No further induction was observed after additional treatment with PCB 156. CYP1A induction caused by BaP was inhibited (40% compared with BaP treatment alone) in flounder pre treated with cadmium, whereas induction by PCB 156 appeared to be unaffected by pre treatment with cadmium.