Preparation
4-Aminonaphthalene-1-sulfonic acid diazo, and 3-Hydroxynaphthalene-2,7-disulfonic acid coupling, and then into aluminum salt deposit color.
Properties and Applications
blu-ray red. Purple fine powder, odourless. Hardly soluble in water, oil and most solvent, but can be scattered, mixed with water, oil liquid and solid powder. When use, acid and alkali through congress effect use effect. This product is suitable for oil products, powder of solid and colloid water-soluble colorants are difficult to use items shading. The product is made of a certain amount of strong HCL, added with a certain volume of two potassium hydrogen sulfate solution diluted, the maximum absorption wavelength for 520 + 2 nm.
