Dye|Dye intermediates|Fluorescent Brightener|pigment dye

Name:C.I.Pigment Red 49:3,C.I.15630:3

Molecular Structure: Single azo

C.I.Pigment Red 49:3,C.I.15630:3,CAS 6371-67-1,378.40,C20H14N2O4S

Molecular Formula:C₂₀H₁₄N₂O₄S

Molecular Weight: 378.40

CAS Registry Number:6371-67-1

Manufacturing Methods :2-Aminonaphthalene-1-sulfonic acid diazotization, and Naphthalen-2-ol coupling, and then into strontium salt.

Properties and Applications:brilliant blue light red. Slightly soluble in hot water and ethanol, slightly soluble in acetone. In concentrated sulfuric acid to red light purple, purple red after diluted solution, and then have red brown precipitation; In concentrated nitric acid for brown light red solution; Slightly soluble in sodium hydroxide solution. Dye ethanol solution to join concentrated hydrochloric acid for brown light purple; Add sodium hydroxide color constant.

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