dye|World dye variety

Name:C.I.Direct Brown 78,C.I.40290

Molecular Structure: Stilbenes

C.I.Direct Brown 78,C.I.40290,CAS 12262-19-0,Hispaluz Brown 3R

Molecular Formula:

Molecular Weight:

CAS Registry Number:12262-19-0

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 Sodium 4-aminobenzenesulfonate  diazotization and Naphthalen-1-amine coupled with heating products. Reaction to the different proportion of material that get different commodity dye.

Properties and Applications:  red light brown. Soluble in water for orange brown, slightly soluble in alcohol. The strong sulfuric acid in blue light green light for black to black, diluted to olive brown for yellow light. The dye solution to join strong hydrochloric acid have yellow olive brown precipitation; Add thick sodium hydroxide solution for palm light orange.

List of Suppliers:

Hispaluz Brown 3R( S A Robama )