Acid green 5

Acid Green 5 (CAS 5141-20-8), also known commercially as Light Green SF Yellowish and AF Green No. 2, is a synthetic triarylmethane acid dye used to impart bright yellow-green shades to a range of substrates. It bonds effectively to protein and polyamide fibers under acidic conditions, making it a reliable colorant choice for industries requiring consistent, reproducible hues for their specific manufacturing needs.

In textile dyeing, this chemical is applied to wool, silk, and nylon fabrics where it delivers strong color yield and good leveling properties under standard acid bath conditions for high-quality results. Leather finishers use it to achieve uniform surface coloration in both drum dyeing and spray application processes. In paper manufacturing, it is used to produce colored printing and packaging grades.

Ink formulators also incorporate it into water-based printing inks for packaging applications requiring bright, defined green shades. This versatility makes it a staple in various industrial coloring processes. The product is supplied as a powder, typically in technical and dyestuff grades meeting standard colorimetric specifications. Purity and dye content are commonly expressed as a percentage of active colorant.

Commercial grades generally range from 60% to 85% dye content depending on the specific application. Bulk quantities are available for industrial buyers, with smaller packaging options for laboratory use.