A purplish-blue fine powder. Odorless. Practically insoluble in water and organic solvents (0.001% to 0.01%). Stronger in light and heat resistance than indigo.
Food Blue 1:1 is used as edible blue pigment. Used alone or in combination in powdered foods, oil products, and sugar-coated cakes. Its applications are limited because aluminum lakes become soluble under acidic and alkaline conditions. It is also used for coloring printing inks on food packaging materials, toys, and tableware.
with strong sulfuric acid or low concentration fuming sulfuric acid sulphonated 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro-, and then into aluminum salt deposit color.
ChEBI: C.I. Pigment Blue 63 is a member of hydroxyindoles.
Flammability and Explosibility
Not classified
Properties and Applications
green light blue. Blue fine powder, odourless. Hardly soluble in water, oil and most solvent, but can be scattered, mixed with water, oil liquid and solid powder. Resistance to light sex, heat resistance, the salt resistance equal ratio of use 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro-. 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 612 + 2 nm.
