Arylide yellow, also known as Monoazo yellow and Hansa Yellow, are a family of organic compounds used as pigments. They are primarily in artistic oil paints and watercolors. These pigments are usually semi-transparent yellows and yellow-greens. Related organic pigments are the diarylide pigments. Overall, these pigments have partially displaced cadmium yellow in the marketplace.
Members of this class include:
- Pigment Yellow 6 (CAS # 2512-29-0), derived from 4-chloro-2-nitroaniline (diazonium precursor) and aniline (acetoacetanilide precursor) to produce medium yellows.
- Pigment Yellow 3 (CAS # 6486-23-3), derived from 4-chloro-2-nitroaniline (diazonium precursor) and 2-chloroaniline (acetoacetanilide precursor) to produce greenish-yellows.
- Pigment Yellow 16 derived from 2,4-dichloroaniline (diazonium precursor) and o-tolidine (acetoacetanilide precursor) to produce medium-yellows.
- Pigment Yellow 74 (CAS # 6358-31-2), derived from 2-methoxy-4-nitroaniline (diazonium precursor) and 2-methoxyaniline (acetoacetanilide precursor) to produce greenish-yellows.
Pigment Yellow 16
- K. Hunger. W. Herbst "Pigments, Organic" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2012. doi:10.1002/14356007.a20_371