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Direct Red 155

Name:C.I.Direct Red 155,C.I.25210

Molecular Structure: Double azo class

C.I.Direct Red 155,C.I.25210,CAS 6661-26-3,789.68,C37H25N7Na2O9S

C.I.Direct Red 155,C.I.25210,CAS 6661-26-3,789.68,C37H25N7Na2O9S

Molecular Formula:C37H25N7Na2O9S

Molecular Weight: 789.68

CAS Registry Number:6661-26-3

Manufacturing Methods :  4-Amino-N-(4-aminophenyl)benzamide double nitriding, first coupling with2-Hydroxybenzoic acid, and   7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications:  red. Soluble in water for big red to red, soluble in ethanol for red orange. The strong sulfuric acid for product red, diluted for pink, dark precipitation. The dye solution to join strong hydrochloric acid for blu-ray red to purplish red color, have precipitation; Add thick sodium hydroxide solution for orange brown, have precipitation.

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

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One Response to “Direct Red 155”

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