dye|World dye variety

Name:C.I.Solubilised Vat Brown 5 ,C.I.734141

Molecular Structure: Thioindigo class

C.I.Solubilised Vat Brown 5 ,C.I.734141,CAS 4425-36-9,602.59,C24H12Na2O8S4,Brown IRRD,Solubilised Vat Brown IRRD

Molecular Formula:C₂₄H₁₂Na₂O₈S₄

Molecular Weight: 602.59

CAS Registry Number:4425-36-9

Manufacturing Methods : (a) in the presence of Pyridine , with Chlorosulfonic acid treatment C.I. Vat Brown 5 leuco; (b) in the Pyridine with metal (such as copper, iron, zinc, etc) and Sulfur trioxide source (such as Sulfur trioxide, Chlorosulfonic acid or Methyl chlorosulfonate, etc.) processing  C.I. Vat Brown 5. The above two kinds of situation after alkaline, filter out insolubles, remove Pyridine and salting out.

Properties and Applications: red light brown. Yellow grey powder. Soluble in water, solubility is very small, do not dissolve in Etanol and organic solvent. In concentrated sulfuric acid for yellow green, dilution after olive. Its aqueous solution for brown, under fluorescent light for brilliant purple, the electrolyte sensitive, it is a kind of both light brittle, and the photosensitivity of dye. Mainly used for cotton fabric dyeing and printing, also can undertake silk, wool, viscose, vinylon fabric dyeing and printing. Can be directly printed, resist printing and discharge printing, white discharge effect is good.

List of Suppliers:

Arlindone Brown IRRD( Arlabs Ltd )