An alkali substance used to make soap, The alkali reacts with oil. Through the saponification process it makes soap. There is no lye in the finished product. Products containing Sodium Hydroxide (Lye) Argan tamanu soap $13.003.5 oz castile coral key lime $9.003.5 oz Castile moringa $11.003.5 oz castile sunny mandarin $9.003.5 oz Charcoal Clay Soap $14.00 emu neem soap $14.003.5 oz Irish Stout Oatmeal Soap $14.00 nori neem soap $12.003.5 oz Shampoo bar $12.004.5 oz shampoo bar basic $11.004.5 oz Shampoo bar esp $14.004.5 oz