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25424-72-0
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???(??):
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Acid Green 4
???(??):
Acid Green 4;C.I.Acid Green 4:C.I.410025;trisodium,iron(3+),3-nitroso-4-oxidonaphthalene-1-sulfonate;trisodium tris[4-hydroxy-3-nitrosonaphthalene-1-sulphonato(2-)-O3,O4]ferrate(3-)
CBNumber:
CB8875170
???:
C30H15FeN3NaO15S3(-2)
??? ??:
832.47
MOL ??:
25424-72-0.mol

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Will on nitrosation 4-Hydroxynaphthalene-1-sulfonic acid, and then turn it into iron sodium salt.

Properties and Applications

yellow light green. Soluble in water for yellow-green solution. The strong sulfuric acid for yellow brown, after dilution is yellow, with Potassium ferricyanide blue precipitation. In water solution to join sodium hydroxide don’t change color.
Standard Light Fastness Soaping Persperation Fastness Oxygen bleaching Fastness to seawater
Fading Stain Fading Stain Fading Stain
ISO 6 3 4 3-4 3-4 4

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