77465-46-4

Basic information

• Product Name: pigment yellow 155
• Synonyms: C.I. Pigment Yellow 155;1,4-Benzenedicarboxylic acid, 2,2'-(1,4-phenylenebis(imino(1-acetyl-2-oxo-2,1-ethanediyl)-2,1-diazenediyl))bis-, 1,1',4,4'-tetramethyl ester;Einecs 271-176-6;N,N'-p-Phenylenebis(2-(2,5-dicarbomethoxyphenyl)azo)acetoacetamide;Tetramethyl 2,2'-(1,4-phenylenebis(imino(1-acetyl-2-oxo-2,1-ethanediyl)azo))bisterephthalate
• CAS NO: 77465-46-4
• Molecular Formula: C34H32N6O12
• Molecular Weight: 716.65088
• Mol File: 77465-46-4.mol
• Article Data: 2

Chemical Properties

• Appearance: /
• CAS DataBase Reference: pigment yellow 155(CAS DataBase Reference)
• NIST Chemistry Reference: pigment yellow 155(77465-46-4)
• EPA Substance Registry System: pigment yellow 155(77465-46-4)

Safety Data

• Hazardous Substances Data: 77465-46-4(Hazardous Substances Data)

Upstream product

• 5372-81-6 dimethyl aminoterephthalate 
• 24731-73-5 1,4-bis-(acetoacetylamino)-benzene 

Relevant articles and documents

The crystal and molecular structure of C.I.Pigment Yellow 155, a high performance bisacetoacetarylide disazo yellow pigment

C.I.Pigment Yellow 155 (Y 155) is an important bisacetoacetarylide disazo yellow pigment with a unique structure, which has the potential to be an alternative for benzidine yellow pigments due to its superior solvent resistance and light fastness. It is essential to investigate the crystal structure of Y 155 to understand the relationship between the structure and technical performance. Y 155 crystallizes in the triclinic P1(—) space group. The molecule exists in the bisketohydrazone form which is consistent with that of disazoacetoacetanilide pigments (Diarylide Yellows). Different from the unsubstituted analogue (BADA), Y 155 molecules are approximately planar due to stronger intramolecular hydrogen bonding. In Y 155 crystals, each molecule is interleaved in two adjacent layers above and below. The color and the technical performance are discussed in relation to its crystal structure especially involving in the role of four methyl formate groups.