The Chemistry Of - Synthetic Dyes. Reactive Dyes

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

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. The Chemistry of Synthetic Dyes. Reactive Dyes

Common in dyes. The chlorine atom on the dye molecule is displaced by the hydroxyl ( OHcap O cap H ) group of the cellulose or the amino ( NH2cap N cap H sub 2 ) group of protein fibres. Result: A stable carbon-oxygen or carbon-nitrogen bond. 2. Nucleophilic Addition Generally requires salt to drive the dye into