Pigment orange 13

Pigment Orange 13 (CAS 3520-72-7, EC 222-530-3, C.I. 21110) is a synthetic azo pigment commercially known as Benzidine Orange and Pyrazolone Orange. It belongs to the disazo chemical class and carries the Colour Index designation C.I. Pigment Orange 13, with no assigned E-code as it is not a food additive.

In printing inks, Pigment Orange 13 delivers strong orange hues in offset and flexographic systems, where its particle structure supports film formation and substrate adhesion. In plastics and coatings, it functions as a surface-active colorant, influencing wetting behaviour and pigment dispersion stability across solvent-borne and water-borne formulations.

Pigment Orange 13 is supplied as a solid powder and is subject to REACH registration requirements within the European Union. Procurement teams should verify supplier compliance documentation, including Safety Data Sheets aligned with EU GHS standards. Standard packaging formats include fibre drums and multi-wall bags depending on order volume.