| Identification | Back Directory | [Name]
6-Hydroxy-2-[3-[(1-hydroxy-4-sodiosulfo-2-naphthalenyl)azo]phenyl]-7-phenylazo-1H-naphth[1,2-d]imidazole-8-sulfonic acid sodium salt | [CAS]
6406-48-0 | [Synonyms]
C.I.26720
Direct Red 57
C.I.Direct Red 57
Benzo Scarlet FBS
C.I.Direct Red 57:C.I.26720
6-Hydroxy-2-[3-[(1-hydroxy-4-sodiosulfo-2-naphthalenyl)azo]phenyl]-7-phenylazo-1H-naphth[1,2-d]imidazole-8-sulfonic acid sodium salt | [MOL File]
6406-48-0.mol |
| Hazard Information | Back Directory | [Preparation]
aniline diazo, and 2-(3-Aminophenyl)-6-hydroxynaphtho[2,1-d]thiazole-8-sulfonic acid coupling, its product to diazo, coupled with the 4-Hydroxynaphthalene-1-sulfonic acid. | [Properties and Applications]
colourful red yellow light. Soluble in water for orange red to big red, right amount soluble in alcohol is palm light orange. The strong sulfuric acid in red for quality, to orange diluted. The dye solution to join strong hydrochloric acid have red precipitate; Add thick sodium hydroxide solution for orange brown.
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Standard
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Acid Resistance
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Alkali Resistance
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Light Fastness
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Soaping
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Water
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Fading
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Stain
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Fading
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Stain
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ISO
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4
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4
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3
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1-2
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1-2
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