Acid Green 28

Preparation

1,4,5,8-Tetrahydroxyanthracene-9,10-dione using hydrochloric acid reduction or 1,4-Dichloro-5,8-dihydroxyanthracene-9,10-dione? and condensation 4-Butylbenzenamine, oxidation, with 100% sulphonated sulfuric acid, and then into sodium salt.

Properties and Applications

blue. Used in mulberry silk, polyamide, wool fabric and the tussah dyeing and printing, but also can be used for leather dyeing.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	6	3-4	4-5	4-5	4-5	4	5	5