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??????4RNS
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3-Aminonaphthalene-1,5-disulfonic acid diazo, and Naphthalen-1-amine coupling, product to diazo, and 2-Amino-4-methylanisole coupling, generation of accidentally nitrogen compounds to diazo, and 4-Nitrobenzene-1,3-diamine coupling.Properties and Applications
red light brown. Moderate soluble in water and ethanol for brown. The strong sulfuric acid for blue-ray green (+ violet black), diluted for Shallow red time The dye solution to join strong hydrochloric acid with brown precipitation; Add thick sodium hydroxide solution for yellow brown, with brown precipitation.| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4 | 5 | 4-5 | 2 | 2 | ||
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Direct Green 100
5-Amino-6-[(2-chlorophenyl)azo]-4-hydroxy-3-[[4'-[(4-hydroxyphenyl)azo]-1,1'-biphenyl-4-yl]azo]-2,7-naphthalenedisulfonic acid disodium salt
Direct Green 102
4-Amino-3-[[4'-[(2,4-diaminophenyl)azo]-1,1'-biphenyl-4-yl]azo]-1-naphthalenesulfonic acid sodium salt
DIRECT BROWN 95
disodium 2'-[4-[[2,6-dihydroxy-3-[(4-sulphonatophenyl)azo]phenyl]azo]phenyl]-6-methyl[2,6'-bibenzothiazole]-7-sulphonate
CALCOMINE DARK GREEN BG
Direct Brown 79
trisodium 4-[[7-[(2,4-diaminophenyl)azo]-1-hydroxy-3-sulphonato-2-naphthyl]azo]-4'-[(4-hydroxyphenyl)azo][1,1'-biphenyl]-2,2'-disulphonate