Dye|Dye intermediates|Fluorescent Brightener|pigment dye

Name:C.I.Pigment Brown 28,C.I.69015

Molecular Structure: anthraquinones

C.I.Pigment Brown 28,C.I.69015,CAS 131-92-0,665.65,C42H23N3O6,Fast Brown R,Natural Violet RL

Molecular Formula:C₄₂H₂₃N₃O₆

Molecular Weight: 665.65

CAS Registry Number:131-92-0

Manufacturing Methods :N-(5-chloro-9,10-dioxo-9,10-dihydroanthracen-1-yl)benzamide and N-(4-amino-9,10-dioxo-9,10-dihydroanthracen-1-yl)benzamide in the presence of copper benzamide condensation, cyclization and sulfuric acid.

Properties and Applications:brown. Slightly soluble in Xylene. In concentrated sulfuric acid for dark wine red, red, brown after dilution with flocks; In the basic insurance powder solution for red brown; In the acidic insurance powder solution for yellow brown. With C.I.Vat Brown 3 same chemical structure

List of Suppliers:

Helio Fast Brown R ( GAF Corporation )

Natural Violet RL(Fenchem Enterprises Ltd)