dye|World dye variety

Name:C.I.Direct Red 70,C.I.16081

Molecular Structure: Single azo class

C.I.Direct Red 69,C.I.14785,CAS 5858-98-0,732.74,C31H18N4Na2O7S4,Thiazine Red GW

Molecular Formula:C₃₁H₁₈N₄Na₂O₇S₄

Molecular Weight: 732.74

CAS Registry Number:5858-98-0

Manufacturing Methods :  p-Methylaniline (2 Moore) and sulfur (4.5 atomic ratio) in 200 ~ 280 ° C heat, with hair smoke from the sulphonated sulfuric acid alkali primrose spirit. The product diazo, and 6-Hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications: yellow light pink to red yellow light. Soluble in water for orange red. The strong sulfuric acid for blood-red, after diluted orange precipitation. The dye solution to join strong hydrochloric acid have orange precipitation; Add thick dark sodium hydroxide solution.

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Thiazine Red GW(BS)