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Direct Red 120

Name:C.I.Direct Red 120,C.I.25275

Molecular Structure: Double azo class

C.I.Direct Red 120,C.I.25275,CAS 6391-27-1,786.70,C33H24N8Na2O9S2,Diazorubin B

C.I.Direct Red 120,C.I.25275,CAS 6391-27-1,786.70,C33H24N8Na2O9S2,Diazorubin B

Molecular Formula:C33H24N8Na2O9S2

Molecular Weight: 786.70

CAS Registry Number:6391-27-1

Manufacturing Methods : N,N’-bis(3-aminophenyl)urea double nitriding, in alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid (2 Moore) coupled.

Properties and Applications: Claret. Soluble in water for orange brown, soluble in ethanol for orange. In the strong sulfuric acid to red, shallow orange for diluted. The dye solution to join strong hydrochloric acid for red orange brown, have precipitation; Add thick sodium hydroxide solution for orange brown, have precipitation; Add 10% sodium hydroxide solution color micro become yellow.

Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 4 5 1 4 3-4
AATCC 5 5 1-2 3 4

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