Osmose's non-toxic soda crystals, also known as sodium carbonate, washing soda or even washing soda, have strong degreasing and water-softening properties. They can be used throughout the home for laundry, dishwashing, housework and DIY. Its most common use is as a laundry detergent optimizer for hard water. Osmose soda crystals are very useful for the care of cloth diapers and greasy clothes.