dye|World dye variety

Name:C.I.Mordant Red 49,C.I.18770

Molecular Structure: Single azo class

C.I.Mordant Red 49,C.I.18770,CAS 6655-99-8,491.41,C20H14N5NaO7S,Chrome Red MGW

Molecular Formula:C₂₀H₁₄N₅NaO₇S

Molecular Weight: 491.41

CAS Registry Number:6655-99-8

Manufacturing Methods : 4-Amino-3-hydroxy-7-nitronaphthalene-1-sulfonic acid diazotization, with 3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one coupling, and then into chromium complex.

Properties and Applications: blue light red. Soluble in water for red light brown, soluble in ethanol and acetone. In concentrated sulfuric acid for dark orange, dilution after yellow brown, and accompanied by precipitation; In concentrated nitric acid for brown light olive; In a dilute sodium hydroxide solution for wine. Dye aqueous solution to join concentrated hydrochloric acid have orange precipitation.

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Chrome Red MGW( Industria Chimica Dott  )