Ponceau 6R

Ponceau 6R (CAS 2766-77-0), also known as Acid Red 44 and formerly designated E126, is a synthetic azo dye used to impart red coloration.

Where is Ponceau 6R used?

• Textile processing: applied to wool, silk, and nylon fabrics using acid dyeing methods
• Leather finishing baths: consistent color uptake on protein-based substrates
• Printing and packaging inks: red tones meeting specific hue and fastness targets
• It has also appeared in food colorant formulations.

Good to know: Regulatory status for food use varies significantly by market and should be confirmed before procurement.

Commercial specifications

• Purity levels commonly expressed as dye content percentage
• Packaging generally in fiber drums or multi-wall bags suited to bulk procurement