21811-64-3

Basic information

• Product Name: p,p'-[p-phenylenebis(azo)]bisphenol
• Synonyms: p,p'-[p-phenylenebis(azo)]bisphenol;Phenol, 4,4'-[1,4-phenylenebis(azo)]bis-;4,4'-(p-Phenylenebisazo)bisphenol;4,4'-[1,4-Phenylenebis(azo)]bis(phenol);C.I.21005;C.I.Disperse Yellow 68;4,4'-(p-Phenylenebis(azo))diphenol;Einecs 244-589-4
• CAS NO: 21811-64-3
• Molecular Formula: C₁₈H₁₄N₄O₂
• Molecular Weight: 318.32936
• EINECS: 244-589-4
• Product Categories: Organics
• Mol File: 21811-64-3.mol
• Article Data: 3

Chemical Properties

• Boiling Point: 497.2°Cat760mmHg
• Flash Point: 254.5°C
• Appearance: /
• Density: 1.27g/cm³
• PKA: 8.50±0.15(Predicted)
• CAS DataBase Reference: p,p'-[p-phenylenebis(azo)]bisphenol(CAS DataBase Reference)
• NIST Chemistry Reference: p,p'-[p-phenylenebis(azo)]bisphenol(21811-64-3)
• EPA Substance Registry System: p,p'-[p-phenylenebis(azo)]bisphenol(21811-64-3)

Safety Data

• Hazardous Substances Data: 21811-64-3(Hazardous Substances Data)

Upstream product

• 1435-60-5 4-(4'-hydroxyphenylazo)nitrobenzene 
• 108-95-2 phenol 
• 106-50-3 1,4-phenylenediamine 
• 122-80-5 N-acetyl-p-phenylenediamine 
• 103-18-4 4-amino-4'-hydroxyazobenzene 
• 14368-49-1 p-nitrobenzenediazonium 

Relevant articles and documents

Bisazo bisphenol-containing compound and preparation method thereof

The invention provides a preparation method of a bisazo bisphenol-containing compound. The preparation method of the bisazo bisphenol compound provided by the invention comprises the following steps of dissolving an aniline compound in a strong acid aqueous solution to obtain an amine salt solution, adding an aqueous solution of sodium nitrite into the amine salt solution to obtain a diazonium salt solution, dissolving a phenol compound in a strong alkali aqueous solution to obtain a phenate solution, wherein the ortho-position of the hydroxyl group of the phenol compound is not provided with a substituent group, and adding the diazonium salt solution into the phenate solution to obtain a solution containing the bisazo bisphenol compound. The preparation method of the bisazo bisphenol compound, provided by the invention, is high in production efficiency and yield and low in production cost.

COLORING COMPOSITION, DICHROIC DYE COMPOUND, LIGHT ABSORPTION ANISOTROPIC FILM, LAMINATE, AND IMAGE DISPLAY DEVICE

A dichroic dye compound has an excellent alignment property when used in a light absorption anisotropic film, and has excellent solubility. A coloring composition contains the dichroic dye compound having a structure represented by Formula (1). In Formula (1), A and B represent a crosslinkable group, a and b are 0 or 1, and a+b is not less than 1. L1 and L2 represent a monovalent substituent, a single bond, or a divalent linking group. Each of Ar1 to Ar3 represents an aromatic hydrocarbon group or heterocyclic group. R1 to R3 represent a monovalent substituent. k represents an integer of 1 to 4. n1, n2, and n3 represent an integer of 0 to 4. In a case where k is 1, n1+n2+n3 is not less than 0, and in a case where k is not less than 2, n1+n2+n3 is not less than 1.