Product Name: 2,2',5,5'-Tetrachlorobenzidine 
Synonyms: [1,1'-biphenyl]-4,4'-diamine, 2,2',5,5'-tetrachloro-; 2,2',5,5'-Tetrachloro-4,4'-biphenyldiamine; 2,2',5,5'-Tetrachlorobiphenyl-4,4'-diamine; TCB 
CAS RN.: 15721-02-5 
EINECS: 239-815-3 
Molecular Weight: 322.0173 
Molecular Formula: C₁₂H₈Cl₄N₂ 
Density: 1.555g/cm³ 
Melting Point(℃): 135-140℃ 
Boiling Point(℃): 408.2°C at 760 mmHg 
Flash Point(℃): 200.7°C