Pigment Orange 34 (Pyrazoloquinazolone)

PO 34 offers one to two grades better lightfastness (6–7 vs 5–6) and slightly higher heat stability (180°C vs 160°C), making it more suitable for exterior industrial coatings and products requiring prolonged outdoor exposure. PO 13 is preferred where cost is the primary driver and UV exposure is limited, such as interior or short-life applications.