Name:C.I.Direct Green 20,C.I.30380
Molecular Structure: trisazo class
Molecular Weight: 963.79
CAS Registry Number:6360-69-6
Manufacturing Methods : 3,3′-Dimethylbenzidine double nitriding, first coupled with 2-Hydroxybenzoic acid, again in alkaline conditions and 2-Aminobenzene-1,4-disulfonic acid diazo, in acid conditions and 4-Amino-5-hydroxynaphthalene-1-sulfonic acid and product of the three matches.
Properties and Applications: dark green. Soluble in water for variegated dark green, slightly soluble in alcohol for blue light green. The strong sulfuric acid for dark blue to violet black, dilute for green leaves after. The dye solution to join strong hydrochloric acid for olive green, precipitation; Add thick sodium hydroxide solution for dark blue light green.
|Standard||Acid Resistance||Alkali Resistance||Light Fastness||Soaping||Water|
List of Suppliers:
Benzo Green FF( Bayer Group )
Green B(Hangzhou Dikai Chemical Co Ltd)