dye|World dye variety

Name:C.I.Direct Orange 40,C.I.40265

Molecular Structure: Stilbenes

C.I.Direct Orange 40,C.I.40265,CAS 1325-62-8/37279-50-8/39363-30-9,Orange R,Orange LER,Supra Brown R

Molecular Formula:

Molecular Weight:

CAS Registry Number:1325-62-8/37279-50-8/39363-30-9

Manufacturing Methods :  in reflux conditions (or a little take pressure), in sodium hydroxide solution will be (E)-2-(2-sulfo-4-nitrostyryl)-5-nitrobenzenesulfonic acid with two 4-Aminobenzenesulfonic acid sodium diazotization and 2-Amino-4-methylanisole coupled with product heat.

Properties and Applications: dark red light orange. Soluble in water for orange to orange brown, slightly soluble in ethanol, insoluble in other organic solvents. The strong sulfuric acid for Gray light purple to blu-ray black, diluted to olive brown for yellow; In nitric acid for yellow olive brown. The dye solution to join strong hydrochloric acid for olive brown to black light brown; Add thick sodium hydroxide solution for orange. Used for cellulose fiber dyeing and printing, also used in leather and paper color

List of Suppliers:

Korostan Orange R(SBU Pigments and Dyes)

Satum Orange LER(SBU Pigments and Dyes)

Sirius Supra Brown R( Bayer Group )