Direct Brown 190

Direct Brown 190 structure

CAS No.

Chemical Name:: Direct Brown 190

Synonyms: Direct Brown 190;C.I.Direct Brown 190:C.I.31750

CBNumber:: CB59702951

Molecular Formula:

Molecular Weight:: 0

MDL Number:

MOL File:: Mol file

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Direct Brown 190 Chemical Properties,Uses,Production

Preparation

4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid , and then in alkaline conditions 6-Amino-4-hydroxynaphthalene-2-sulfonic acid? coupling, product diazo again, and Resorcinol coupling.

Properties and Applications

red light brown. Soluble in water, ethanol and soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid in the dark for the light blue, diluted red brown for solution, accompanied by precipitation. The dye solution to join 10% sulfuric acid as pale blue light red jujube; Add thick sodium hydroxide solution for blue-ray purplish red color.

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

Direct Brown 190 Preparation Products And Raw materials

Raw materials

Salicylic acid 6-Amino-4-hydroxy-2-naphthalenesulfonic acid Benzidine Resorcinol

Preparation Products

(Direct Brown 190)Related Search:

Direct Brown 191 DIRECT BROWN 2 Direct Brown 179 Direct Brown 185 C.I. Direct Brown 18

Direct Brown 186 sodium 2,6-bis[(2,4-diaminophenyl)azo]toluene-4-sulphonate 5-[[4'-[[3-[(3-Carboxy-2-hydroxy-5-sulfophenyl)azo]-2,6-dihydroxyphenyl]azo]-1,1'-biphenyl-4-yl]azo]-2-hydroxybenzoic acid trisodium salt 2-Hydroxy-5-[[4'-[[2,6-dihydroxy-3-[[2-hydroxy-5-(aminosulfonyl)phenyl]azo]phenyl]azo]-1,1'-biphenyl-4-yl]azo]benzoic acid sodium salt

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Direct Brown 190 C.I.Direct Brown 190:C.I.31750