Säurefarbstoffe gelb 42

Acid dyes yellow 1.Characteristics 1). CAS No: 6375-55-9 2). EINECS No:228-940-9 3). Formula:C32H24N8Na2O8S2 4). Appearance: powder 5). Usage: it can be used in leather, textile and printing and so on 2.Specification We have been putting efforts toward modification of existing products and development of new products. 1) Wide range of shades, excellent combinability 2)High light fastness, even for pale shades 3) Vary good leveling and migration properties 4) Good covering properties 5) Good dyeing properties 3.Application: Acid dyes are water-soluble dyes employed mostly in the form of sodium salts of the sulfonic carboxylic acids. They can be anionic which attach strongly to cationic groups in the fiber directly. They can be applicable to all kind of natural fibers like wool, cotton and silk as well as to synthetics like polyesters, acrylic and rayon. But they are not substantive to cellulosic fibers. They are also used in paints, inks, and leather. Orange acid azo dyes produce an orange-pink color. They are used in coloring foods and drugs and as intermediates for making photosensitive dyes.