C.I. pigment red 3

C.I. Pigment Red 3, also known as Toluidine Red, CI 12120, and RW RED RN, is a monoazo organic pigment with CAS number 2425-85-6. It carries no E-code designation and is classified under EC 219-372-2. The molecular formula is C17H13N3O3.

In printing inks and packaging coatings, Toluidine Red delivers strong red-to-orange hues through its azo chromophore structure, which absorbs light selectively in the blue-green spectrum. It is also incorporated into plastics and elastomers, where its heat stability supports processing at elevated temperatures without significant colour shift.

C.I. Pigment Red 3 is available as a dry powder and in presscake or dispersion grades depending on the application. Suppliers operating within the EU must comply with REACH registration requirements. Packaging is typically supplied in fibre drums or multi-wall bags; buyers should confirm grade specifications and regional regulatory status prior to procurement.