Acid Green 4
Name:C.I.Acid Green 4,C.I.410025
Molecular Structure: nitroso class
C.I.Acid Green 4,C.I.410025,CAS 25424-72-0,878.46,C30H15FeN3Na3O15S3,Naphthol Green G
Molecular Formula:C30H15FeN3Na3O15S3
Molecular Weight: 878.46
CAS Registry Number:25424-72-0
Manufacturing Methods : 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 | ||
List of Suppliers:
Naphthol Green G( Levinstein Ltd )