These are vinyl sulphone based Reactive Dyes widely used for Dianisidine, Ortho di anisidine, dyeing & printing of cellulose fibres for its very good fastness properties. Ortho di anisidine are having good features like, good solubility even in presence of alkali, very good fastness properties, can be applied both by exhaust & padding methods, possesses less affinity hence very good leveling property & suitable for resist & discharge Dianisidine printing very much effectively. These dyes are applied by exhaust method at the optimum temperature of 60-65 Deg. C.