What we found is that ammonia is flammable at concentrations of 16-25%. As per Wholeliving.com, new bleaches don't contain any ammonia at all while some has 1.5 percent or less.
Ammonia in higher concentrations can cause burns to the skin. It is put into hair color in order to bust through the hair cuticle to deposit color. A consequence of this action is damage to the hair cuticle that ultimately degrades the hair’s structural integrity.
The result overtime is dry, brittle, unhealthy looking hair.
Learn more about the dangerous effects of ammonia in hair color at Avantgardtheschool.com.