dye|World dye variety

Name:C.I.Vat Brown 42,C.I.73665

Molecular Structure: Thioindigo class

C.I.Vat Brown 42,C.I.73665,CAS 6424-67-5,398.26,C20H9Cl2NO2S,Nako Fast Brown R

Molecular Formula:C₂₀H₉Cl₂NO₂S

Molecular Weight: 398.26

CAS Registry Number:6424-67-5

Manufacturing Methods : Naphtho[2,1-b]thiophen-1(2H)-one with 2,2,5,7-Tetrachloro-3-indolinone condensation.

Properties and Applications: brown. Brown powder. In concentrated sulfuric acid to red light brown, dilution after brown. Alkaline reduction leuco for yellow orange; Acid reduction leuco for yellow. To cellulose fibre substantivity high, good levelness. Used for cotton fabric direct dyeing, reserving and coloring discharge, also can be used for silk and wool dyeing.

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Nako Fast Brown R( Hoechst A G )