Direct Brown 186
- CAS No.
- Chemical Name:
- Direct Brown 186
- Synonyms
- Direct Brown 186;C.I.Direct Brown 186:C.I.22775
- CBNumber:
- CB29702950
- Molecular Formula:
- Molecular Weight:
- 0
- MOL File:
- Mol file
Direct Brown 186 Chemical Properties,Uses,Production
Preparation
2-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 Applications
black 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 materials
Preparation Products
(Direct Brown 186)Related Search:
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
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Direct Brown 186
C.I.Direct Brown 186:C.I.22775