Soda Crystals contain no phosphates, no enzymes, and no bleach. They contain no perfume, and they have no odor. Soda Crystals are easy to use. You mix them with water to make a mild solution, a regular solution, or a strong solution. You can even make a cleaning paste to dissolve stubborn stains. Use Soda Crystals in the kitchen to clean blackened or burnt pans, work surfaces, teapots, tea stained cups, chopping boards, kettles, silverware, floors and tiles and greasy cooker hoods and filters. Remove stains and boost the cleaning power of Soap Flakes or your laundry detergent. To remove stains, soak items stained with grease, grass, blood, ink, wine, tea or coffee in a solution of Soda Crystals and water and break down the stain so your regular wash cycle can easily handle the rest. Soda Crystals can be safely mixed with Soap Flakes, borax and baking soda and have long been a favorite with environmentally conscious consumers as Soda Crystals do not contain phosphates, enzymes or bleaches. They are biodegradable and do not harm your lawn or septic system. While Soda Crystals are not caustic, if you are submerging your hands in a solution for a long time, it is advisable to wear rubber gloves especially if you have sensitive skin. Keep out of the reach of children. Detergent free. There are approximately 3.5 cups of Soda Crystals per bag.