Iron stains are difficult to remove from clothing. Stain remover is easily applied and quickly removes such stains. May be applied directly or with cotton tipped applicator. Not for use on skin. Keep a bottle available in each treatment room for prompt response to inadvertent spills. For Monsel's and Ferric Chloride. 5% Oxalic Acid in water.Reduced risk of tattooing compared to Monsel's.