Ascent Dye Chem offers Reactive Yellow HE4R Dye. Ascent Dye Chem manufactures different types of Reactive Dyes. The Reactive Yellow HE4R Dye or Reactive Yellow 84 are highly pure and are known for excellent alkali stability and leveling features. The Reactive Yellow HE4R Dye finds application in varied industries, which include textile dyeing, printing, painting, paper, and leather. The features of the dye are high density, resistance to temperature fluctuations, free from impurities and high viscosity.