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Basic Green 4
Green with sparkling crystals. Soluble in water, easily soluble in ethanol, all are blue-green. The dye is yellow in concentrated sulfuric acid, and turns dark orange after dilution; orange in concentrated nitric acid, orange-brown after dilution; sodium hydroxide is added to its aqueous solution to produce a white precipitate with green light. Dyeing at high temperature (120℃), the shade does not change. Dyeing on acrylic with light fastness class 4-5. is a synthetic dye and antibacterial agent that is potentially carcinogenic. It can be used as a biological stain to dye cells or tissue into blue-green for easy study under the microscope. Also used as a dye for silk, leather and paper.
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