Absolutely not. There is bad information circulating online to lead you to believe that mixing hydrogen peroxide and ammonium hydroxide causes carcinogenic chemicals to form - that were not present in each ingredient alone. Well, It is simply not true. It's just a scare tactic to manipulate you in believing that no ammonia colors are safer or better for you. They are not!
don't fall for their marketing gimmicks, in fact it is the opposite, when you mix ammonia substitutes such as ethanolamie there is the production of a dangerous formaldehyde residue! Buyer beware.EcocColors hair color does not contain this ingredient (mea).