c.i. acid red 4

C.I. Acid Red 4 is a red dye.

4',5'-Dibromofluorescein (Eosinic acid) is a fluorescent dye utilized as a ligand in protein characterization through spectroscopic analysis.

C.I. Pigment Red 4 can be used in printing ink, paint, watercolor, paint and inkpad color, rubber, natural raw lacquer, cosmetics, paint and coating printing color.It is of yellow red powder with bright color.It can be insoluble in water, slightly soluble in ethanol and benzene.It apears brilliant scarlet in concentrated nitric acid and remains its color in a dilute sodium hydroxide solution;It apears purple in the ethanol-potassium hydroxide solution. It has good liquidity and cover resistance and poor heat resistance.