Basic malachite green CI basic green 4 is a cationic dye because the pigment group has a positive charge. It is characterized by uniform color and strong coloring power. Basic malachite green is widely used as colorations, and it can have deep and rich color if a small amount of dye is used. Its application effect is more prominent than other colorations.
Basic malachite green, as a cationic dye, is a special dye for nitrile fiber. The dyeing method is to use acetic acid and sodium acetate as buffers in a bathtub with weak acidity (pH value is about 4.5). In the presence of dielectric and a certain amount of auxiliaries, it is close to boiling dyeing.
Basic malachite green has appearance of powder and crystals. Soluble in water, soluble in ethanol, blue-green. The dye is yellow in sulfuric acid and turns dark orange after dilution; orange in nitric acid and orange brown after dilution; the addition of sodium in its aqueous solution produces a white precipitate with green light. When dyed at high temperature (120 ℃), the color light does not change. Dyeing fastness on acrylic fiber is Grade 4-5.
Basic malachite green can be used for acrylic blended fabric, as well as for the coloring of stationery, paper and the manufacture of lake.
This article is from Cangzhou Xincheng Weiye Chemical-Rhodamine B dye China manufacturer.
Contact person: Miss Jessie Geng
Post time: Feb-24-2020