PR48—Permanent Red

Pigment Type

organic, monoazo

Chemical Name

beta-oxynaphthoic acid lake

Chemical Formula

n/a

Properties

Beta-oxynaphthoic acid (BONA) lake pigments vary in their hue and other properties, depending on what metals they form a salt with. Both pure and mixed metal salts are used. They tend to have high tinting strength and good stability and lightfastness.

Permanence

Beta-oxynaphthoic acid lake pigments tend to have high tinting strength and good stability and lightfastness, but results vary with the application, and the presense of titanium dioxide may reduce lightfastness. 

Toxicity

n/a

History

Beta-oxynaphthoic acid may have been synthesized as early as 1887. Commerical use of BONA lake pigments began in the 20th century.

Alternate Names

Brilliant Red, Ruby Red