PY 110 – isoindolinone yellow

This isoindolinone class of pigments were developed in 1946 and commercially available in the 1960s.

Manufacturer/ product code:  Kremer / 23670
Chemical Description:  isoindolinone
Color: yellow
Color Index: PY 110
Date:  from 1964

PY 110 – Isoindolinone Yellow is a synthetic organic pigment belonging to the isoindolinone family, a group of high-performance yellow pigments valued for their bright hue, excellent lightfastness, and chemical stability. PY 110 is characterized by a warm, clear yellow with slight orange undertones, offering high chromatic purity and versatility in both artistic and industrial applications.

Chemically, PY 110 is based on the isoindolinone molecular structure, consisting of fused aromatic rings with nitrogen atoms that stabilize the chromophore. This configuration provides exceptional resistance to light, heat, and chemical agents, ensuring permanence in paints, coatings, plastics, and inks. Its stability also makes it suitable for fine art media, where durability and long-term color retention are required.

In practical use, Isoindolinone Yellow exhibits strong tinting strength and semi-opaque to transparent behavior depending on particle size and formulation. It blends cleanly with other yellows, reds, and whites to produce a broad spectrum of warm hues, from bright golden yellows to muted pastels. Its transparency allows for glazing and layering techniques in oil, acrylic, and watercolor media, making it highly versatile for artistic expression.

From a conservation and analytical perspective, PY 110 is chemically inert and resistant to fading, maintaining both chromatic purity and brightness over time.