The arylide yellows are entirely organic in composition, containing no metals. While one pigment doesn't provide a range of choice equal to that available in the current range of cadmium yellows, it is a starting point. Using it as the primary component of a mixing color will extend its attributes to other hue positions. Although the properties of these new organic pigments are in many ways similar to cadmium colors, they are not identical in every respect. The biggest variation is how the colors mix to create new colors.
Organics typically produce cleaner, less muddy mixtures.
Other colors, such as the iron oxides, can be added if muddier colors are needed. Once established, a pigment is rarely deemed entirely superfluous. Cadmium pigments will always have devotees, regardless of any disadvantages. An example of this persistence is the continued demand for true Alizarin Crimson, a pigment that fades badly, long after the introduction of the highly stable quinacridone family, from which a nearly identical match may be made. Another example is the continued demand for lead white, despite its toxicity, concerns about environmental impact and suitability of Titanium and Zinc White blends.