One significant application of calcium hydroxide is as a flocculant, in water and sewage
treatment. It forms a fluffy charged solid that aids in the removal of smaller particles
from water, resulting in a clearer product. This application is enabled by the low cost and
low toxicity of calcium hydroxide. It is also used in fresh water treatment for raising the
pH of the water so that pipes will not corrode where the base water is acidic, because it is
self-regulating and does not raise the pH too much also used in the preparation of ammonia
gas, using the following reaction.
Because of its low toxicity and the mildness of
its basic properties, slaked lime is widely used in the food industry to.