Dye|Dye intermediates|Fluorescent Brightener|pigment dye

Name:C.I.Pigment Blue 21,C.I.69835

Molecular Structure: anthraquinones

C.I.Pigment Blue 21,C.I.69835,CAS 1324-26-1,545.76,C28H11Cl3N2O4,Indo Blue Reddish B-75

Molecular Formula:C₂₈H₁₁Cl₃N₂O₄

Molecular Weight: 545.76

CAS Registry Number:1324-26-1

Manufacturing Methods :(1) in 1-Nitrobenzene in ANTIMONY (V) CHLORIDE or Sulfuryl CHLORIDE chlorinated Anthraquinone Blue (C.I. Vat Blue 4, C.I. 69800); (2) in Sulfuryl chloride and Thionyl chloride or ANTIMONY (V) chloride with too much chlorine chlorinated Anthraquinone Blue (C.I. Vat Blue 4, C.I. 69800); (3) in the presence of Manganese dioxide in sulfuric acid with chlorine chlorinated Blue anthrone Anthraquinone Blue (C.I. Vat Blue 4, C.I. 69800).

Properties and Applications:red light blue. In concentrated sulfuric acid to dark yellow brown, dilution for blue. In the basic insurance powder solution for blue; In the acidic insurance powder solution for red light blue.

List of Suppliers:

Indo Blue Reddish B-75(Mobay Corp Dyes & Pigments Div.)