The Chemistry Of Synthetic Dyes. Reactive Dyes May 2026

Excellent, because the dye is chemically locked to the fibre.

Links the chromophore to the reactive system. ⚗️ The Reaction Mechanism

Known for incredibly vivid and brilliant shades. The Chemistry of Synthetic Dyes. Reactive Dyes

A major challenge where the dye reacts with water instead of the fibre, creating "spent" dye that must be washed away.

The part that provides color (usually azo, anthraquinone, or phthalocyanine groups). Solubilising Group: Often sulfonic acid salts ( SO3Nacap S cap O sub 3 cap N a ) that make the dye water-soluble. Excellent, because the dye is chemically locked to the fibre

The chemistry of reactive dyes centers on their unique ability to form a permanent covalent bond with the substrate, typically cellulose (cotton) or protein fibres (wool/silk). Unlike other dyes that simply "sit" on or inside the fibre, reactive dyes become a chemical part of the fibre itself. 🧪 Chemical Structure Reactive dyes consist of four primary components:

The dye attaches to the fibre through a chemical reaction triggered by alkaline conditions (high pH). There are two main types of reaction mechanisms: 1. Nucleophilic Substitution A major challenge where the dye reacts with

Generally requires salt to drive the dye into the fibre and alkali to fix it. 🌍 Environmental Impact