Boulder uses organic salt, and takes advantage of its cleaning ability. Boulder 100% Natural Cleaners are made Colorado. The inspiration from this health-oriented and environmentally conscious area led to a product that produces great results while being 100% natural and biodegradable. Our 100% Natural Products are: Biodegradable Safe for Septic Systems Safe for Greywater Systems VOC Free Non-Toxic Not Tested on Animals Hypoallergenic Our 100% Natural Products contain no: EDTA or NTA Animal Ingredients Phosphates Dyes or Perfumes Chlorine Bleach Petro Chemicals CONTAINS: Water, Caprylyl/Myristyl Glucoside (plant derived cleaning agent), Glycolic Acid (removes hard water scaling), Sodium Hydroxide (pH adjuster), Natural Fragrance, FD&C Yellow 5, FD&C Blue 1(Artificial colorants). *Available in some retailers without color.