MF: C₁₂H₄C_l6
MW: 360.878 g/mol
Density: 1.593 g/cm³ 
Flash Point: 198.9 °C
Index of Refraction: 1.626
Appearance: Viscous oily liquid.
Enthalpy of Vaporization: 62.97 kJ/mol 
Boiling Point: 403.8 °C at 760 mmHg
Vapour Pressure: 2.31E-06 mmHg at 25°C 
IUPAC Name: 1,2,3-Trichloro-4-(2,3,4-trichlorophenyl)benzene
Synonyms: Aroclor 1260, 1X1ML, ISO, 1000UG/ML ; [40cfr136(1986)]Pcb-1260 ; Aroclor1260(pcb) ; Aroclor1260referencestandardforclp ; Articlescontainingpolychlorinatedbiphenyls(pcb) ; Chlorodiphenyl(60%cl) ; Kanechlor600. ; phenoclordp6 .
Following is the molecular structure of Polychlorinated biphenyl (aroclor 1260) (11096-82-5):
            

Reactivity Profile of Polychlorinated biphenyl (aroclor 1260) (11096-82-5): Simple aromatic halogenated organic compounds are very unreactive. Reactivity generally decreases with increased degree of substitution of halogen for hydrogen atoms.

Consensus of Polychlorinated biphenyl (aroclor 1260) (11096-82-5):

NTP 10th Report on Carcinogens. IARC Cancer Review: Animal Limited Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 18 ,1978,p. 43.(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) ; Human Limited Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 18 ,1978,p. 43.(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) .

Confirmed carcinogen with carcinogenic and neoplastigenic data. Moderately toxic by ingestion and skin contact. Experimental reproductive effects. Mutation data reported. When heated to decomposition it emits highly toxic fumes of Cl⁻. Used in heat transfer, hydraulic fluids, lubricants, and insecticides.
Safety Information of Polychlorinated biphenyl (aroclor 1260) (11096-82-5):
Hazard Codes: F,N,Xn
F  Highly Flammable N: Dangerous for the environment Xn: Harmful
Risk Statements: 11-23/24/25-39/23/24/25-67-65-62-51/53-48/20-38-50/53
11: Highly Flammable 
23/24/25: Toxic by inhalation, in contact with skin and if swallowed 
39/23/24/25: Toxic: danger of very serious irreversible effects through inhalation, in contact with skin and if swallowed 
67: Vapors may cause drowsiness and dizziness 
65: Harmful: May cause lung damage if swallowed 
62: Possible risk of impaired fertility 
51/53: Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment 
48/20: Harmful: danger of serious damage to health by prolonged exposure through inhalation 
38: Irritating to the skin 
50/53: Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment 
Safety Statements: 36/37-45-62-61-60-33-29-16-9
36/37: Wear suitable protective clothing and gloves 
45: In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) 
62: If swallowed, do not induce vomiting: seek medical advice immediately and show this container or label 
61: Avoid release to the environment. Refer to special instructions safety data sheet 
60: This material and/or its container must be disposed of as hazardous waste 
33: Take precautionary measures against static discharges 
29: Do not empty into drains 
16: Keep away from sources of ignition - No smoking 
9: Keep container in a well-ventilated place 
RIDADR: 2315
HazardClass: 9
PackingGroup: II

NIOSH REL: TWA (Polychlorinated Biphenyls) 0.001 mg/m³