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Direct Brown 173

Name:C.I.Direct Brown 173,C.I.30165

Molecular Structure: trisazo class

C.I.Direct Brown 173,C.I.30165,CAS 6826-64-8,764.56,C32H19N6Na3O11S

C.I.Direct Brown 173,C.I.30165,CAS 6826-64-8,764.56,C32H19N6Na3O11S

Molecular Formula:C32H19N6Na3O11S

Molecular Weight: 764.56

CAS Registry Number:6826-64-8

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, First coupled with 2-Hydroxybenzoic acid
diazo,  and then with 3-Amino-2-hydroxy-5-sulfobenzoic acid coupling,and Resorcinol coupled to accidentally coupled nitrogen compounds.

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

Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 3 3-4 6 4 4-5
AATCC 5 2-3 5-6 2 4

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