pH Stable Dyes

Keystone Aniline Corp. offers a wide range of dyes for use in extreme pH ranges. Coloring products with high or low pH can be difficult, due to the harsh environment. Chemical and pH extremes may stress the dye molecule until it cleaves, or perhaps even change the solvent value of the product, rendering the dye unsuitable. The chemical reactions within a product may affect the properties of the dye over time. Therefore, even when using dyes with good stability profiles, full stability testing must be done on both product and product efficacy.