Pigment yellow 181

Pigment Yellow 181 (CAS 74441-05-7) is a heterocyclic azo pigment belonging to the isoindoline-benzimidazolone class, commercially known under trade names including PV Fast Yellow H 3R, Yellow H 3R, and TCY 18001E. It carries the C.I. number 11777 and is identified under EC 277-873-1. No E-code designation applies to this substance.

In high-performance printing inks, PY 181 delivers strong yellow hues with reliable lightfastness and heat stability, making it suitable for packaging applications subject to UV exposure. In coatings and plastics, its surface-active character supports pigment wetting and dispersion, reducing agglomeration and improving film uniformity without requiring additional dispersing agents.

PY 181 is supplied in powder form and is subject to REACH registration requirements for European market access. Procurement teams should confirm supplier SDS documentation and confirm compliance with applicable industry standards for coatings or food-contact packaging before specification.