dye|World dye variety

Name:C.I.Direct Red 187,C.I.40275

Molecular Structure: Azo,Stilbene

C.I.Direct Red 187,C.I.40275,CAS 1325-64-0,Cuproxon Red BL

Molecular Formula:

Molecular Weight:

CAS Registry Number: 1325-64-0

Manufacturing Methods :  in reflux (or a little take pressure), under the condition of sodium hydroxide solution in (E)-2-(2-sulfo-4-nitrostyryl)-5-nitrobenzenesulfonic acid and 3-Sulfo-5-aminosalicylic acid diazo, and 2-Amino-4-methylanisole coupled to a heating products.

Properties and Applications: yellow light red. Moderate soluble in water for orange brown, not soluble in alcohol. The strong sulfuric acid for blue-black, diluted for ash brown. The dye solution to join strong hydrochloric acid have dark brown precipitation; Add thick sodium hydroxide solution has the purple precipitation.

List of Suppliers:

Cuproxon Red BL( CBW Chemie GmbH Bitterfeld-Wolfen )