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3,4,5,6-tetrachlorobenzene-1,2-dicarbonitrile (Molecular Formula: C8Cl4N2)
Product Name: 3,4,5,6-tetrachlorobenzene-1,2-dicarbonitrile
CAS Registry Number: 1953-99-7
EINECS: 217-783-1  
Synonyms: 3,4,5,6-Tetrachlorophthalonitrile; o-TCPN;3,4,5,6-Tetrachlorobenzene-1,2-dicarbonitrile; 1953-99-7; tetrachloro-; Phthalonitrile;3,4,5,6-tetrachlorobenzene-1,2-dicarbonitrile;
Molecular Structure:
Molecular Formula: C8Cl4N2
Molecular Weight: 265.911
Density:  1.71 g/cm3
Boiling Point:  353.9 °C at 760 mmHg
Melting Point:  249-252  °C (dec.)(lit.)
Flash Point:  156 °C
Refractive index:  1.632
Risk Codes:  20/21/22
Safety Statements:  36
Hazard Symbols:  Xn: Harmful;
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