These dyes belong to the new class of SUNACTIVE Dyes, having high substantivity and superior exhaustion. HE dyes are recommended for dyeing of cellulosic material by batchwise method on jigger, winch or open vat etc, for obtaining brighter shades. He dyes are mainly suite for dyeing of mixed shade as they are less sensitive to variation in Liquor to goods ratio and concentration of electrolytes in the dye batch as compared to cold or hot brands. The main advantage of HE dyes is excellent built up, high fixation, good compatibility, consistency of color yield and excellent wet fastness properties.