ACID SCARLET 3R

CI Name: ACID RED 18
CI No: 16255
CAS No: 2611-82-7
Shade Tone:
Formula: C20H11N2Na3O10S3
Molecular Weight: 604.47 g/mol
Appearance: Dark red powder
Applications: Dyeing of wool, silk, nylon, paper, and leather. Also used in food colouring, cosmetics, and inks depending on grade.

ACID SCARLET 3R (Acid Red 18), commonly known as Ponceau 4R, is a synthetic azo dye widely used for producing bright red shades. It dissolves readily in water and exhibits good dyeing performance on wool, silk, and nylon fibres. The dye is also used for colouring paper and leather products.

Due to its vibrant red shade and stability, Acid Red 18 is used in several industrial colouring applications including inks and coatings. Its reliable colour strength and easy application make it a preferred dye for consistent red coloration in textile and industrial processes.