Swiss O-Par lash and brow dye can be used in the comfort of your own home without the need to visit a salon - and at a fraction of the cost Swiss o Par does NOT contain any of the harsh coal tar derivatives or hydrogen peroxide bleaching agents. The product is non-hazardous and non-toxic & is specifically designed for home use. The product is perfectly safe if used as directed. If either ingredient comes into contact with the eye wash immediately and thoroughly with water until the stinging is relieved.