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C.I. Direct Black 20, disodium salt

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C.I. Direct Black 20, disodium salt Basic information
Product Name:C.I. Direct Black 20, disodium salt
Synonyms:C.I. Direct Black 20, disodium salt;Direct Black 20;C.I.Direct Black 20:C.I.30395
CAS:7237-47-0
MF:C38H35N10NaO10S2
MW:878.87
EINECS:615-756-2
Product Categories:
Mol File:7237-47-0.mol
C.I. Direct Black 20, disodium salt Structure
C.I. Direct Black 20, disodium salt Chemical Properties
Safety Information
MSDS Information
C.I. Direct Black 20, disodium salt Usage And Synthesis
Preparation3,3′-Dimethoxylbenzidine double nitriding, in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid, and then three with Benzene-1,3-diamine coupling, N-(4-aminophenyl)acetamide diazo, and formation of accidentally coupled nitrogen compounds.
Properties and Applicationsblue and black. Moderate soluble in water (for violet black) and ethanol (for dark purple). The strong sulfuric acid for Gray light black, diluted for dark purple. The dye solution to join strong hydrochloric acid have dark purple precipitation; Add thick sodium hydroxide solution have sauce red precipitate.
Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 3 5 3 1-2 2
C.I. Direct Black 20, disodium salt Preparation Products And Raw materials
Raw materialso-Dianisidine-->8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt monohydrate-->m-Phenylenediamine-->4'-Aminoacetanilide
Tag:C.I. Direct Black 20, disodium salt(7237-47-0) Related Product Information
Direct Black 201 2-Naphthalenesulfonic acid, 6-[[2-amino-4-[(2-hydroxyethyl)amino]phenyl]azo]-3-[[4-[[4-amino-6(or 7)-sulfo-1-naphthalenyl]azo]phenyl]azo]-4-hydroxy-, disodium salt Direct Black 196 Direct Black 199 Direct Black 198 Direct Black 202 Glycine, N-[5-amino-4-[[7-[[4-[(4-amino-6-sulfo-1-naphthalenyl)azo]phenyl]azo]-8-hydroxy-6-sulfo-2-naphthalenyl]azo]-2-methylphenyl]-, trisodium salt DIRECT BLACK 22 Direct Black 197