15721-02-5

Basic information

• Product Name: 2,2',5,5'-Tetrachlorobenzidine
• Synonyms: 1’-biphenyl)-4,4’-diamine,2,2’,5,5’-tetrachloro-(;1’-biphenyl]-4,4’-diamine,2,2’,5,5’-tetrachloro-[;2,2’,5,5’-tetrachloro-4,4’-diaminodiphenyl;2,2’,5,5’-tetrachloro-benzidin;3,3’,6,6’-tetrachlorobenzidine;2,2',5,5'-TETRACHLOROBENZIDINE;4,4'-DIAMINO-2,2',5,5'-TETRACHLOROBIPHENYL;4,4'-diamino-5,5',2,2'-tetrachlorobiphenyl
• CAS NO: 15721-02-5
• Molecular Formula: C₁₂H₈Cl₄N₂
• Molecular Weight: 322.02
• EINECS: 239-815-3
• Product Categories: Intermediates of Dyes and Pigments;Biphenyl & Diphenyl ether
• Mol File: 15721-02-5.mol
• Article Data: 2

Chemical Properties

• Melting Point: 135-140 °C(lit.)
• Boiling Point: 477.67°C (rough estimate)
• Flash Point: 200.67 °C
• Appearance: /
• Density: 1.5309 (rough estimate)
• Refractive Index: 1.6000 (estimate)
• Storage Temp.: -70°C
• Solubility: soluble in Methanol
• PKA: 1.58±0.13(Predicted)
• CAS DataBase Reference: 2,2',5,5'-Tetrachlorobenzidine(CAS DataBase Reference)
• NIST Chemistry Reference: 2,2',5,5'-Tetrachlorobenzidine(15721-02-5)
• EPA Substance Registry System: 2,2',5,5'-Tetrachlorobenzidine(15721-02-5)

Safety Data

• Hazard Codes: T
• Statements: 61
• Safety Statements: 53-45
• WGK Germany: 3
• RTECS: DD1751000
• Hazardous Substances Data: 15721-02-5(Hazardous Substances Data)

Usage

Safety Profile

Suspected carcinogen with experimental carcinogenic and tumorigenic data. When heated to decomposition it emits very toxic fumes of NO, and Cl-.

Upstream product

• 7647-01-0 hydrogenchloride 
• 6392-96-7 2,5-dichloro-4-aminoacetanilide 
• 60696-76-6 N,N'-bis-(2,5-dichloro-phenyl)-hydrazine 

Downstream Products

• 35694-04-3 2,2',3,3',5,5'-hexachlorobiphenyl 
• 35693-99-3 2,2',5,5'-Tetrachlorobiphenyl 
• 35065-27-1 2,2',4,4',5,5'-Hexachlorobiphenyl 

Relevant articles and documents

Functionalized Photoreactive Compounds

The present invention concerns functionalized photoreactive compounds of formula (I), that are particularly useful in materials for the alignment of liquid crystals. Due to the adjunction of an electron withdrawing group to specific molecular systems bearing an unsaturation directly attached to two unsaturated ring systems, exceptionally high photosensitivities, excellent alignment properties as well as good mechanical robustness could be achieved in materials comprising said functionalized photoreactive compounds of the invention.