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Direct Brown 186

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Direct Brown 186 Basic information
Product Name:Direct Brown 186
Synonyms:Direct Brown 186;C.I.Direct Brown 186:C.I.22775
CAS:
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MW:0
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Mol File:Mol File
Direct Brown 186 Structure
Direct Brown 186 Chemical Properties
Safety Information
MSDS Information
Direct Brown 186 Usage And Synthesis
Preparation2-Amino-5-(4-amino-3-barboxyphenyl)benzoic acid?double nitriding, first coupled with 2-Hydroxybenzoic acid, again in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid? coupling.
Properties and Applicationsblack light brown. Soluble in water for purplish red, slightly soluble in alcohol. The strong sulfuric acid for purple, diluted for Light red orange time The dye solution to join strong hydrochloric acid for red sauce, precipitation; Add thick sodium hydroxide solution for orange brown..
Direct Brown 186 Preparation Products And Raw materials
Raw materialsSalicylic acid-->4,4'-DIAMINOBIPHENYL-3,3'-DICARBOXYLIC ACID-->6-Amino-4-hydroxy-2-naphthalenesulfonic acid
Tag:Direct Brown 186 Related Product Information
Direct Brown 191 DIRECT BROWN 2 Direct Brown 179 Direct Brown 190 Direct Brown 185 C.I. Direct Brown 18 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